Polarization Definition and 669 Threads

Homework Statement http://xs.to/image-A876_4BAF6DF1.jpg alpha = 54.6 degrees I need to calculate phase difference between E(perpendicular) and E(parallel) polarization components. Homework Equations The Attempt at a Solution Problem is I don't know any relevant equations...

Homework Statement Two polarizers are oriented at 62° to one another. Light polarized at a 31° angle to each polarizer passes through both. What reduction in intensity takes place? ___.% Homework Equations I=IoCos^2((-)) The Attempt at a Solution Tried suing the above equation...

It took me a little while to wrap my head around circularly polarized light, or more specifically how this can be done "passively". Wikipedia didn't do much help until I found the article at Polarizer, if any of you were wondering how the new 3D movie technology works. My first question is...

Homework Statement Which model of light is used to explain polarization? Ray optics or particle model? Homework Equations The Attempt at a Solution I don't know. My guess is particle model.

All I know is that polarization density satisfies two equations \[ \begin{array}{l} \rho _{bound} = - \nabla \cdot \vec P \\ \sigma _{bound} = \vec n_{out} \cdot \vec P \\ \end{array} \] This is the divergence and boundary conditions of P.But to determine a vector field...

Hi Everybody, I'm currently working my way through Sakurai's second book, "Advanced Quantum Mechanics." I'm getting held up on a short several paragraphs on the connection between photon spin and polarization. On pages 42-43, Sakurai states: "Since the polarization transforms like a...

When summing over photon polarizations for a given amplitude if it can be written as: M = M^{\mu} \epsilon^{*}_{\mu}} then \sum_\epsilon |\epsilon^{*}_\mu M^\mu |^2 = \sum_\epsilon \epsilon^{*}_\mu epsilon\nu M^\mu M^{* \nu} and you can replace the sum over polarizations with a -g_{\mu...

Hi there. Sorry for my poor English first. I have been reading chapter about polarization in Feynman Lectures on Physics. There is a experiment about polarization using 2 polaroids and birefringence cellophane located between two polaroids. optic axis of two polaroids are 0 and 90 in...

Homework Statement A coaxial cable of circular cross section has a compound dielectric. The inner conductor has an outside radius a , which is surrounded by a dielectric sheath of dielectric constant K_1 and of outer radius b . Next comes another dielectric sheath of dielectric constant...

I find that some book e.g. Many-body theory of solids by John C. Inkson P145 says that :" By analogy with the classical polarization, we define a polarization propagator through the relationship ... ε=1-vP" , where ε is the dielectronic response function, and v is the bare Coulomb...

Hi, I have a particle physics exam tomorrow morning (in a few hours from now, in my time zone). I'm trying to figure out the whole reasoning behind pion-nucleon scattering. Please bear with me.. We write the scattering matrix as S = 1 - iT where T is given by T = f + i g...

After we measure the position of a particle fairly sharply, it “spreads out” or the uncertainty grows according to the Heisenberg uncertainty principle. After we measure the polarization of a photon, does it spread out, too? If not, why not? If so, how fast? TIA Jim Graber

how to find which polarization ?? a classical charged particle moving with frequency 'w' in a circular orbit of radius 'a' centerd at the origin in the x-y plane, em radiation. At points (b,0,0) and (0,0,b) where b >> a the em waves are 1. circularly polarised and elliptically polarised...

Does anyone here use Feyncalc? (Or have a better alternative). I have terms that I need to simplify like : (2 Pair[Momentum[p1], Momentum[PB]] Pair[Momentum[p2], Momentum[Polarization[q, -I]]] Pair[Momentum[PB], Momentum[Polarization[q, I]]])/( Pair[Momentum[p1], Momentum[q]]...

Vacuum polarization is when an EM field causes the virtual particle pairs around it to become polarized like a dipole. The most common example is with an electron in vacuum, but a transmitting radio antenna could do it as well. But, if this was with an oscillating signal, it would create waves...

Homework Statement in a homework problem we have a spherical dielectric shell with permittivity of 1 [like a vacuum. inside are charges that are released and we have to say what the charge distribution will look like later. if the dielectric can be polarized, i know what the charges will do...

Part of my independant investigation requires me to carry out an experiment, which when I graph results, would confirm Malus' Law. I plan on using a bulb as my ambient source and two polarizing lenses. I will then measure the intensity of the light after polarization. Hopefully, if i graph...

I have an optical fiber system that consists of a linear polarizer, a manual polarization controller, and a reflector (Bragg grating). I want to make sure that the polarization at the Bragg grating is circular (either right or left circular will do). Can someone tell me if the following...

Can any give me a general idea of what is Spin Polarization ? and how can spin polarized electrons define logic levels(Spintronics) ? Faraz Nizamani

i read this "in electrodynamics, polarization characterizes em waves, such as light, by specifying the direction of the wave's electric field" in a book. i really didn't get it clear & does the magnetic filed nothing to do with polarization?

A beam of unpolarized light (III=IP= I0 and EII= EP= E0) is incident from air on a plane interface of water (n = 1.33). (a) Under the incident angle of θi = 0°, 30°, and 70°, what is the amplitude (E) and intensity (I) of the reflected beam (relative to the values E0 and I0 of the incident...

In the energy producing region of the sun there is a large radial flux of high energy photons. Does this outward flux polarize the plasma and give rise to a electric field in this inner region? What is an order of magnitude estimate of this field? As the sun rotates this field gives rise to a...

Homework Statement Characterize the polarization (i.e., linear, circular, or elliptical) of the transmitted and reflected waves for the case in which a circularly-polarized field is incident on an interface at Brewster's angleHomework Equations N/A The Attempt at a Solution I thought that...

In the text, it is said that the polarization is just the response of the input electric field so they have P = \epsilon_0 \chi E where P is the polarization and E is the input. This makes sense to me. However, why we need \epsilon_0 sitting there? Since \epsilon_0 has no dimension, so...

Is anybody knows what kind of equipment or lens can be used to change the direction of the polarization of the laser light (electrical field and magnetic field, but not the direction of the light)? Thanks.

Homework Statement Describe how a metal sphere on an insulating stand is charged if a positively-charged rod were to touch the sphere. (This is a 5 mark problem, so at least 5 major points should be included in the answer. I am not sure whether I have fully answered the problem.) Homework...

Hello every body; I am having a problem understanding how light is polarized by reflection, what happens during the process, and why is it polarized at a particular angle "Angle of Polarization". Can you please help me with this problem? I'll be thankful.

Do neodymium magnets polarized like this and with this same shape exist? http://upload.wikimedia.org/wikipedia/commons/d/d8/Bar_magnet.jpg

Homework Statement What property of the photon is responsible for the absence of longitudinal polarization? Homework Equations The Attempt at a Solution I thought it is because of the presence of its angular momentum. Is it true?

I'm sorry if what I say is not right, or I haven't understood it right, - In 3+1 D we have the photon with spin 1 => it has two polarizations. Our Gauge field A_\mu has 4 components => We have two extra degrees of freedom. => We need to get rid of the extra 2 fixing the gauge. 1. The...

Hi, Can someone explain the concept of "Poincare sphere"? What's the relationship between the Poincare Sphere and the Degree of polarization of EM fields? Thanks Madara

Hey all, Polarization of light is still confusing for me :-( i read a lot but i couldn´t clear my concept . can anybody of yous explain... I would be very thankful. Best regards Abid

Statement: Consider two dipole antennas, oriented 90degrees apart [imagine the x-y plane, let "a" be the dipole oriented along the x-axis, and the "b" be the dipole oriented along the y-axis]. If "a" dipole radiates cos(\omega t) and "b" dipole radiates sin(\omega t), the field radiated by the...

Statement: Consider two dipole antennas, oriented 90degrees apart [imagine the x-y plane, let "a" be the dipole oriented along the x-axis, and the "b" be the dipole oriented along the y-axis]. If "a" dipole radiates cos(\omega t) and "b" dipole radiates sin(\omega t), the field radiated by the...

Statement: Consider two dipole antennas, oriented 90degrees apart [imagine the x-y plane, let "a" be the dipole oriented along the x-axis, and the "b" be the dipole oriented along the y-axis]. If "a" dipole radiates cos(\omega t) and "b" dipole radiates sin(\omega t), the field radiated by the...

#degrees of polarization of a spin 1 or 2 particle On page 32 of Quantum Field Theory by A. Zee, he expects you to remember the concept of polarization, specifically how to extract the number of degrees of polarization of a spin 1 or 2 particle. As I seem to remember from EM class...

Hi, I read several literatures on quantum cryptography plug and play system. I found out that Faraday mirror was used to compensate polarization fluctuations. Photons are reflected orthogonally by Faraday mirror and their polarization changes will then be autocompensated, provided they follow...

Following Fig. 1 in the following paper: Eberly (2002): Bell inequalities and quantum mechanics In an ideal case (this is far from easy to do): Send an incident beam from one side of entangled photon pairs into a beamsplitter, and then recombine the outputs back into a single stream. Let's...

I was wondering how exactly a single photon is polarized. In the case of an electromagnetic wave in theoretical free space Maxwell's equations state that electric and magnetic fields must be equal in amplitude and in phase with each other. On wikipedia's "photon polarization" article it states...

Hi I’m a student, and I started reading Zwiebach’s First Course in String Theory, but I still haven’t learned general relativity, only special relativity, and so I’m having some difficulties in understanding the polarization tensor for the perturbation of the Minkowski metric leading to the...

The wikipedia page on photoelectric effect http://en.wikipedia.org/wiki/Photoelectric_effect talks of a 5th experimental result, which I hadn't heard before: "The direction distribution of emitted electrons peaks in the direction of polarization (the direction of the electric field) of the...

Can somebody explain me what are precisely the polarization vectors of a photon and how they relate to the photon's momentum and helicity ? Or give me reference of textbooks in which I could learn more on this topic ? Thanks a lot for your help!

Hi. It is supposed that External field imposes to dielectric matter and Polarization occurs. Thus, Bounded volumb and surface charge are made. My question is, is field induced by Bounded charge in addition to original(external) field different from original field existing...

Hi all, I'm implementing ray tracing .. If we say that an antenna is linearly vertically polarized, does that mean that the direction of E field emitted from the antenna is vertical with respect to the coordinates of the antenna or vertical with respect to each ray's coordinates? For...

i faced this term in a special paper. i can't figure it out what it exactly means.

I am currently doing experiments with polarizing optics and reflection from metal surfaces. However it's not as simple as it sounds in textbooks, so I was wondering if anyone had experience in these type of experiments. There seems to be a fundamental problem with identifying the transmission...

Homework Statement At what angle above the horizon is the Sun when light reflecting off a smooth lake is polarized most strongly? Homework Equations dsin(θ) = mλ I = E^2 The Attempt at a Solution I think that the polarization is strongest when the angle between the light...

Can an electromagnetic wave be both circular polarized and horizontal or E polarized at the same time?

Hi everyone, I am a little bit confused on a concept relating to optics. If we have an interferometer (lets say a Sagnac interferometer) after the two beams traverse equal paths and recombine, the S and P polarizations are in phase but orthogonal. Does this mean that the light is essentially a...

1. Here's the question: The percent polarization P of a partially polarized beam of light is defined as P = [Imax - Imin]/[Imax + Imin] x 100 where Imax and Imin are the max and min intensities that are obtained when the light...