In electrodynamics, circular polarization of an electromagnetic wave is a polarization in which the electric field of the passing wave does not change strength but only changes direction in a rotary manner.
In electrodynamics the strength and direction of an electric field is defined by what is called an electric field vector. In the case of a circularly polarized wave, as seen in the accompanying animation, the tip of the electric field vector, at a given point in space, describes a circle as time progresses. If the wave is frozen in time, the electric field vector of the wave describes a helix along the direction of propagation.
Polarization of light, linear and circular | Light waves | Physics | Khan Academy
This is the underlying physics behind 3D glasses. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/wave-interference?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/light-waves/introduction-to-light-waves/v/electromagnetic-waves-and-the-electromagnetic-spectrum?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid und...
published: 07 Jul 2014
Circular Polarization — Lesson 7
This video lesson teaches us that circular polarization occurs when a field consists of two perpendicular components of equal magnitude that are plus or minus 90 degrees out of phase. It is part of the Ansys Innovation Course: Electromagnetic Plane Waves. To access this and all of our free, online courses — featuring additional videos, quizzes and handouts — visit Ansys Innovation Courses at www.ansys.com/courses. This course was created for Ansys Innovation Courses by Kathryn Leigh Smith, Assistant Professor, UNC-Charlotte in partnership with Ansys.
published: 20 Oct 2020
Circular polarization
An illustration of circular polarization, made in Blender.
You could think of this as the workings of a quarter wave plate. If the first resultant wave entered the plate and the optic axis whas parallell to Ez, then the (red) z-component would be retarded by a quarter wavelength and the (blue) y-axis would stay the same. The linearly polarized first resultant wave would then turn into the circularly polarized second resultant wave.
published: 27 Feb 2012
Linear, Circular and Elliptical Polarization Animation in a Single Shot
#polarization
The time-domain progression of the total electric field components of plane waves traveling in the +z direction with various polarizations. Specifically, linear, right hand circular and elliptical polarizations are shown.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/wat...
published: 13 Mar 2011
Right Hand Circular Polarization (RHCP) Animation
Uniform plane wave traveling in +z direction. x and y components of the electric field are shown as traveling, the total electric field at z=zs is shown in green.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
To watch linear, circular and elliptical polarization animation in a single shot, see the below video:
http://www.youtube.com/watch?v=Q0qrU4nprB0
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch...
published: 12 Mar 2010
Circularly Polarized Light Explained
https://www.patreon.com/edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way to do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
How can light travel in a circle? In this video, we explore circular polarization, where the electric and magnetic fields of a plane wave trace out a circle in space. We also go over the Jones vectors for right-hand circularly polarized and left-hand circularly polarized light, and hopefully clear up some of the confusion around the conventions used.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the...
published: 18 Aug 2019
Circular Polarization Explained
The flux lines rotate as the wave travels through space.
http://www.sciencewriter.net
published: 15 Apr 2016
Polarization of Light: circularly polarized, linearly polarized, unpolarized light.
3D animations explaining circularly polarized, linearly polarized, and unpolarized electromagnetic waves.
published: 12 Nov 2015
Create Circularly Polarized Light Using a Quarter-Wave Plate (QWP) | Thorlabs Insights
Circularly polarized light can be generated by placing a quarter-wave plate in a linearly polarized beam, provided a couple of conditions are met. The first is that the light's wavelength falls within the wave plate's operating range. The second is that the wave plate's slow and fast axes, which are orthogonal, are oriented at 45° to the direction of the linear polarization state. When this is true, the incident light has equal-magnitude components parallel to the wave plate's two axes. The wave plate delays the component parallel to the slow axis by a quarter of the light's wavelength (pi/2) with respect to the component parallel to the fast axis. By creating this delay, the wave plate converts the polarization state from linear to circular.
An animation at the beginning of the demonstra...
This is the underlying physics behind 3D glasses. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/...
This is the underlying physics behind 3D glasses. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/wave-interference?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/light-waves/introduction-to-light-waves/v/electromagnetic-waves-and-the-electromagnetic-spectrum?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
This is the underlying physics behind 3D glasses. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/wave-interference?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/light-waves/introduction-to-light-waves/v/electromagnetic-waves-and-the-electromagnetic-spectrum?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
This video lesson teaches us that circular polarization occurs when a field consists of two perpendicular components of equal magnitude that are plus or minus 9...
This video lesson teaches us that circular polarization occurs when a field consists of two perpendicular components of equal magnitude that are plus or minus 90 degrees out of phase. It is part of the Ansys Innovation Course: Electromagnetic Plane Waves. To access this and all of our free, online courses — featuring additional videos, quizzes and handouts — visit Ansys Innovation Courses at www.ansys.com/courses. This course was created for Ansys Innovation Courses by Kathryn Leigh Smith, Assistant Professor, UNC-Charlotte in partnership with Ansys.
This video lesson teaches us that circular polarization occurs when a field consists of two perpendicular components of equal magnitude that are plus or minus 90 degrees out of phase. It is part of the Ansys Innovation Course: Electromagnetic Plane Waves. To access this and all of our free, online courses — featuring additional videos, quizzes and handouts — visit Ansys Innovation Courses at www.ansys.com/courses. This course was created for Ansys Innovation Courses by Kathryn Leigh Smith, Assistant Professor, UNC-Charlotte in partnership with Ansys.
An illustration of circular polarization, made in Blender.
You could think of this as the workings of a quarter wave plate. If the first resultant wave entered...
An illustration of circular polarization, made in Blender.
You could think of this as the workings of a quarter wave plate. If the first resultant wave entered the plate and the optic axis whas parallell to Ez, then the (red) z-component would be retarded by a quarter wavelength and the (blue) y-axis would stay the same. The linearly polarized first resultant wave would then turn into the circularly polarized second resultant wave.
An illustration of circular polarization, made in Blender.
You could think of this as the workings of a quarter wave plate. If the first resultant wave entered the plate and the optic axis whas parallell to Ez, then the (red) z-component would be retarded by a quarter wavelength and the (blue) y-axis would stay the same. The linearly polarized first resultant wave would then turn into the circularly polarized second resultant wave.
#polarization
The time-domain progression of the total electric field components of plane waves traveling in the +z direction with various polarizations. Speci...
#polarization
The time-domain progression of the total electric field components of plane waves traveling in the +z direction with various polarizations. Specifically, linear, right hand circular and elliptical polarizations are shown.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Polarizzazione di una Onda ELM: Lineare, Circolare ed Ellittica.
#polarization
The time-domain progression of the total electric field components of plane waves traveling in the +z direction with various polarizations. Specifically, linear, right hand circular and elliptical polarizations are shown.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Polarizzazione di una Onda ELM: Lineare, Circolare ed Ellittica.
Uniform plane wave traveling in +z direction. x and y components of the electric field are shown as traveling, the total electric field at z=zs is shown in gree...
Uniform plane wave traveling in +z direction. x and y components of the electric field are shown as traveling, the total electric field at z=zs is shown in green.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
To watch linear, circular and elliptical polarization animation in a single shot, see the below video:
http://www.youtube.com/watch?v=Q0qrU4nprB0
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Dipole Antenna Radiation
http://www.youtube.com/watch?v=AfNWn8_xeL0
Uniform plane wave traveling in +z direction. x and y components of the electric field are shown as traveling, the total electric field at z=zs is shown in green.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
To watch linear, circular and elliptical polarization animation in a single shot, see the below video:
http://www.youtube.com/watch?v=Q0qrU4nprB0
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Dipole Antenna Radiation
http://www.youtube.com/watch?v=AfNWn8_xeL0
https://www.patreon.com/edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way to do that is by becoming a pat...
https://www.patreon.com/edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way to do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
How can light travel in a circle? In this video, we explore circular polarization, where the electric and magnetic fields of a plane wave trace out a circle in space. We also go over the Jones vectors for right-hand circularly polarized and left-hand circularly polarized light, and hopefully clear up some of the confusion around the conventions used.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
https://www.patreon.com/edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way to do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
How can light travel in a circle? In this video, we explore circular polarization, where the electric and magnetic fields of a plane wave trace out a circle in space. We also go over the Jones vectors for right-hand circularly polarized and left-hand circularly polarized light, and hopefully clear up some of the confusion around the conventions used.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
Circularly polarized light can be generated by placing a quarter-wave plate in a linearly polarized beam, provided a couple of conditions are met. The first is ...
Circularly polarized light can be generated by placing a quarter-wave plate in a linearly polarized beam, provided a couple of conditions are met. The first is that the light's wavelength falls within the wave plate's operating range. The second is that the wave plate's slow and fast axes, which are orthogonal, are oriented at 45° to the direction of the linear polarization state. When this is true, the incident light has equal-magnitude components parallel to the wave plate's two axes. The wave plate delays the component parallel to the slow axis by a quarter of the light's wavelength (pi/2) with respect to the component parallel to the fast axis. By creating this delay, the wave plate converts the polarization state from linear to circular.
An animation at the beginning of the demonstration illustrates the results of aligning the input linear polarization state with the wave plate's fast axis, slow axis, and angles in between. The perspective used to describe the angles and orientations is looking into the source, opposite the direction of light propagation. The procedure is then demonstrated for orienting input and output polarizers to define the reference orthogonal polarization directions, as well as provide polarization-dependent power measurements. The wave plate is placed between the two polarizers, and the effects of different orientations are explored. The quality of the circularly polarized light output by the wave plate is checked by rotating the second polarizer's transmission axis. The light's polarization is closer to circular when the power reading fluctuates less during rotation.
0:00 - Introduction
0:43 - QWP Use Discussed, Illustrated
3:24 - Step 1: Cross Linear Polarizers
5:19 - Step 2: Align QWP
8:40 - Step 3: Circular Polarization Check
Components used in this demonstration include:
- HeNe Laser: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1516&YVI=9
- HeNe Laser's Optical Isolator: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2996&pn=IO-2D-633-VLP&YVI=9
- C1512 V-Clamp Mount: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=174&pn=C1512&YVI=9
- PRM1 Precision Rotation Mounts: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=990&pn=PRM1&YVI=9
- BA2 Base: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=47&pn=BA2&YVI=9
- WPQ10M-633 Zero-Order Quarter-Wave Plate: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7234&pn=WPQ10M-633&YVI=9
- LPVISC100-MP2 Linear Film Polarizers: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=752&pn=LPVISC100-MP2&YVI=9
- S130C Power Sensor: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=S130C&YVI=9
- SM1A29 SM1 Thread Adapter for the Power Sensor https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=SM1A29&YVI=9
- SM1 Lens Tube: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3307&YVI=9
- PM400 Power Meter: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=10562&pn=PM400&YVI=9
For questions, please reach out to [email protected]; more photonics how-to videos can be found at https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=14062&YVI=9.
Circularly polarized light can be generated by placing a quarter-wave plate in a linearly polarized beam, provided a couple of conditions are met. The first is that the light's wavelength falls within the wave plate's operating range. The second is that the wave plate's slow and fast axes, which are orthogonal, are oriented at 45° to the direction of the linear polarization state. When this is true, the incident light has equal-magnitude components parallel to the wave plate's two axes. The wave plate delays the component parallel to the slow axis by a quarter of the light's wavelength (pi/2) with respect to the component parallel to the fast axis. By creating this delay, the wave plate converts the polarization state from linear to circular.
An animation at the beginning of the demonstration illustrates the results of aligning the input linear polarization state with the wave plate's fast axis, slow axis, and angles in between. The perspective used to describe the angles and orientations is looking into the source, opposite the direction of light propagation. The procedure is then demonstrated for orienting input and output polarizers to define the reference orthogonal polarization directions, as well as provide polarization-dependent power measurements. The wave plate is placed between the two polarizers, and the effects of different orientations are explored. The quality of the circularly polarized light output by the wave plate is checked by rotating the second polarizer's transmission axis. The light's polarization is closer to circular when the power reading fluctuates less during rotation.
0:00 - Introduction
0:43 - QWP Use Discussed, Illustrated
3:24 - Step 1: Cross Linear Polarizers
5:19 - Step 2: Align QWP
8:40 - Step 3: Circular Polarization Check
Components used in this demonstration include:
- HeNe Laser: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1516&YVI=9
- HeNe Laser's Optical Isolator: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2996&pn=IO-2D-633-VLP&YVI=9
- C1512 V-Clamp Mount: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=174&pn=C1512&YVI=9
- PRM1 Precision Rotation Mounts: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=990&pn=PRM1&YVI=9
- BA2 Base: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=47&pn=BA2&YVI=9
- WPQ10M-633 Zero-Order Quarter-Wave Plate: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7234&pn=WPQ10M-633&YVI=9
- LPVISC100-MP2 Linear Film Polarizers: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=752&pn=LPVISC100-MP2&YVI=9
- S130C Power Sensor: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=S130C&YVI=9
- SM1A29 SM1 Thread Adapter for the Power Sensor https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=SM1A29&YVI=9
- SM1 Lens Tube: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3307&YVI=9
- PM400 Power Meter: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=10562&pn=PM400&YVI=9
For questions, please reach out to [email protected]; more photonics how-to videos can be found at https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=14062&YVI=9.
This is the underlying physics behind 3D glasses. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/wave-interference?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/light-waves/introduction-to-light-waves/v/electromagnetic-waves-and-the-electromagnetic-spectrum?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
This video lesson teaches us that circular polarization occurs when a field consists of two perpendicular components of equal magnitude that are plus or minus 90 degrees out of phase. It is part of the Ansys Innovation Course: Electromagnetic Plane Waves. To access this and all of our free, online courses — featuring additional videos, quizzes and handouts — visit Ansys Innovation Courses at www.ansys.com/courses. This course was created for Ansys Innovation Courses by Kathryn Leigh Smith, Assistant Professor, UNC-Charlotte in partnership with Ansys.
An illustration of circular polarization, made in Blender.
You could think of this as the workings of a quarter wave plate. If the first resultant wave entered the plate and the optic axis whas parallell to Ez, then the (red) z-component would be retarded by a quarter wavelength and the (blue) y-axis would stay the same. The linearly polarized first resultant wave would then turn into the circularly polarized second resultant wave.
#polarization
The time-domain progression of the total electric field components of plane waves traveling in the +z direction with various polarizations. Specifically, linear, right hand circular and elliptical polarizations are shown.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Polarizzazione di una Onda ELM: Lineare, Circolare ed Ellittica.
Uniform plane wave traveling in +z direction. x and y components of the electric field are shown as traveling, the total electric field at z=zs is shown in green.
The convention used is as defined in the IEEE standard (not the one used in many optics book)
http://en.wikipedia.org/wiki/Circular_polarization#First_convention:_From_the_point_of_view_of_the_source
To watch linear, circular and elliptical polarization animation in a single shot, see the below video:
http://www.youtube.com/watch?v=Q0qrU4nprB0
Also see below:
Oblique Plane Wave Reflection From Half Space
http://www.youtube.com/watch?v=0-koW8jm8Pw
Radiation from a Circularly Tapered Dielectric Waveguide
http://www.youtube.com/watch?v=EXvdruxTDKk
Right Hand Circular Polarization (RHCP) Animation
http://www.youtube.com/watch?v=jY9hnDzA6Ps
Linear Polarization Animation
http://www.youtube.com/watch?v=oDwqUgDFe94
Left Hand Elliptical Polarization (LHEP) Animation
http://www.youtube.com/watch?v=KZz25bmTWXo
Standing Wave Pattern (SWR) Animation
http://www.youtube.com/watch?v=s5MBno0PZjE
Electromagnetic Propagation of UWB Short Pulse in Random Medium
http://www.youtube.com/watch?v=qpDQ44F4Qks
Dipole Antenna Radiation
http://www.youtube.com/watch?v=AfNWn8_xeL0
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If you want to see more of these videos, or would like to say thanks for this one, the best way to do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
How can light travel in a circle? In this video, we explore circular polarization, where the electric and magnetic fields of a plane wave trace out a circle in space. We also go over the Jones vectors for right-hand circularly polarized and left-hand circularly polarized light, and hopefully clear up some of the confusion around the conventions used.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
Circularly polarized light can be generated by placing a quarter-wave plate in a linearly polarized beam, provided a couple of conditions are met. The first is that the light's wavelength falls within the wave plate's operating range. The second is that the wave plate's slow and fast axes, which are orthogonal, are oriented at 45° to the direction of the linear polarization state. When this is true, the incident light has equal-magnitude components parallel to the wave plate's two axes. The wave plate delays the component parallel to the slow axis by a quarter of the light's wavelength (pi/2) with respect to the component parallel to the fast axis. By creating this delay, the wave plate converts the polarization state from linear to circular.
An animation at the beginning of the demonstration illustrates the results of aligning the input linear polarization state with the wave plate's fast axis, slow axis, and angles in between. The perspective used to describe the angles and orientations is looking into the source, opposite the direction of light propagation. The procedure is then demonstrated for orienting input and output polarizers to define the reference orthogonal polarization directions, as well as provide polarization-dependent power measurements. The wave plate is placed between the two polarizers, and the effects of different orientations are explored. The quality of the circularly polarized light output by the wave plate is checked by rotating the second polarizer's transmission axis. The light's polarization is closer to circular when the power reading fluctuates less during rotation.
0:00 - Introduction
0:43 - QWP Use Discussed, Illustrated
3:24 - Step 1: Cross Linear Polarizers
5:19 - Step 2: Align QWP
8:40 - Step 3: Circular Polarization Check
Components used in this demonstration include:
- HeNe Laser: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1516&YVI=9
- HeNe Laser's Optical Isolator: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2996&pn=IO-2D-633-VLP&YVI=9
- C1512 V-Clamp Mount: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=174&pn=C1512&YVI=9
- PRM1 Precision Rotation Mounts: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=990&pn=PRM1&YVI=9
- BA2 Base: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=47&pn=BA2&YVI=9
- WPQ10M-633 Zero-Order Quarter-Wave Plate: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7234&pn=WPQ10M-633&YVI=9
- LPVISC100-MP2 Linear Film Polarizers: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=752&pn=LPVISC100-MP2&YVI=9
- S130C Power Sensor: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=S130C&YVI=9
- SM1A29 SM1 Thread Adapter for the Power Sensor https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3328&pn=SM1A29&YVI=9
- SM1 Lens Tube: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3307&YVI=9
- PM400 Power Meter: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=10562&pn=PM400&YVI=9
For questions, please reach out to [email protected]; more photonics how-to videos can be found at https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=14062&YVI=9.
In electrodynamics, circular polarization of an electromagnetic wave is a polarization in which the electric field of the passing wave does not change strength but only changes direction in a rotary manner.
In electrodynamics the strength and direction of an electric field is defined by what is called an electric field vector. In the case of a circularly polarized wave, as seen in the accompanying animation, the tip of the electric field vector, at a given point in space, describes a circle as time progresses. If the wave is frozen in time, the electric field vector of the wave describes a helix along the direction of propagation.
Circularly polarized light ... When excited by blue or ultraviolet light, the assembled TAT emits bright green light with strong circular polarization ... Additionally, the light maintained a strong circular polarization.
This warming will affect the PolarVortex. The Polar Vortex is a fast-spinning circular motion usually located about 50,000 feet in the atmosphere ... Polar Vortex forecast from March 6 to March 20, 2025.
The spent rocket parts fell into the Atlantic Ocean. The upper stage's Vinci engine ignited two times to reach a nearly circular polar orbit about 500 miles (800 kilometers) above the Earth... Read full article. Comments .
After last month’s polar vortex collapse, a second one is expected to unleash freezing conditions across North America... Conventionally, a strong polar vortex is circular, like a rubber band, as it rests on a surface untouched.