Polarization Definition and 613 Threads

spin 1/2 in B-field polarization direction?? Homework Statement A spin 1/2 particle with magnetic momnet mu=mnot*sigma is placed in uniform B-field, where the magnetic field is pointing in (theta,phi) direction in spherical coordinates At t=0, the particle is in the (1 0) state...

Hi everyone, When a guitar string is played its motion of displacement can be considered in two planes horizontal and vertically. With consideration of the nut and bridge of a guitar (ends) I've been told their their terminating conditions be different? How does the motion cause a...

What astrophysical processes can result in the polarization of light, and by what mechanisms is that accomplished? (By light, I mean any form of EM waves, from gamma to radio.)

Homework Statement 1)I have a basic doubt on polarization. It is given in book that the plane of polarization is perpendicular to the plane of vibration. What was need for defining the plane of polarization to be perpendicular to the plane of vibration? When I searched the internet, I found a...

Homework Statement We have a long cylindrical, dielectric shell in the z-axis with inner radius R1 and outer radius R2. The polarization is given by P=k/s^2 (in cylindrical coordinates, it is only in the shat direction, i.e. no zhat or phihat) Homework Equations Find the bound surface...

I am a beginner in polarization, and questions keep raising when I revise this topic:frown: : Scattering: 1. After the molecule absorb the energy of incident light wave, the energy is reemitted in all direction. Why is it still a kind of polarization if the light emitted is in all...

Can any 1 please help me out with this...i'm not able to understand the term polarization when associated with electric fields??

This is more of a conceptual question: Where does the equation for the intensity of polarized light come from? I know the standard form is: I=(1/2)(I_0) after the EM wave passes through the first polarizer. Why is that? Why is the intensity exactly half? The polarizer ensures...

Homework Statement Light that is polarized along the vertical direction is incident on a sheet of polarizing material. Only 66% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. No light passes through the second sheet. What angle does the...

Say I have a polarization [3i, 2], How do I find a polarization that is orthogonal? I know that, AA^{\cdot }\; +\; BB^{\cdot }\; =\; 0 But my problem is that it yields one equation and two unknowns which I can't solve for. Furthermore, I am a bit confused on the representation of [3i,2]...

Homework Statement Using the explicit expression for the mulitpolar polarization, find the matrix elements <2s | P(r) | 1s> of the microscopic polarization between the 1s and 2s states of the hydrogen atom.Homework Equations P(r) = \int dr' r' \rho(r') \delta(r-r') I don't understand how the...

the intensity of polarised light is equal to half of the intensity of the light before it has been polarised, and this has been explained to me as being a result of half of the incident light being parallel and half perpendicular to the plane of polarisation, and so half passes through and half...

Homework Statement A beam of unpolarized radiation is incident upon an electron. Show that the degree of polarization in the light scattered at an angle \theta to the incident beam is \Pi where \Pi = \frac{1- \cos^2\theta}{1+ \cos^2 \theta}. 2. The attempt at a solution This is a...

Homework Statement Light reflecting off most outdoor surfaces such as roadways and bodies of water have less vibrations perpendicular to the surface than parallel to it. What type of polarizing lens would be the most effective at minimizing the glare off these surfaces?2. The attempt at a...

Hi, I'm considering working on something (vague, I know), but the whole thing hinges on whether or not it's possible to change the polarization of a magnet, and how. The basic premise is that I need two magnets which are attracting each other (so one positive and one negative charge), but I...

Hi, all, My question is if I have two plane E&M wave traveling in the x-z plane, and they are polarized along the y direction, and I know that there is an angle theta between their propagation vectors, how do I set up the equations to get the intereference pattern in the z direction? I...

i'm in a bit of a tizzy with an optics class question... it goes like this: under the application of a time varying electric field the induced polarization in a dielectric may be described by the equation: P = [(Ne^2)/(-m(omega)^2-im(omega)(gamma)+k)][E+(1/3(permittivity))P] where the...

I'm doing some calculations and I've run into something rather strange. I need to evaluate the following dot products \vec{\epsilon}_{k,\,s}\cdot\vec{\epsilon}_{-k,\,s'} = ? \vec{\epsilon}_{k,\,s}^*\cdot\vec{\epsilon}_{-k,\,s'}^* = ? where \vec\epsilon_{k,\,s} is the normalized...

I'm trying to teach myself polarization and dielectrics by doing problems, but it's not going as well as I'd hoped. Here's the first problem that I got stuck on: A round dielectric disc of radius R is statically polarized so that it gains the uniform polarization P, with the vector P lying in...

when light incident at the boundary of another medium with brewester angle why does only parallel component absorb and perpendicular component is reflected. WHY? we say that whenever incident light frequency matches with that of medium(with motion of atoms ) ,light is absorbed.so why not the...

Studying for finals and this is one of the reveiw questions our teacher wanted us to take a look at. A little help please, i got started somewhat as you will see below "Suppose that we have a lot of noninteracting atoms (a gas) in an external magnetic field. You may take as given the fact that...

I have a quick question about polarization. When I put a polarizer up an unpolarized source, say the polarizer blocks all the polarization in th y direction and so all the photons in the x direction comes out of the polarizer. Is the intesity halved? It seems to me that the intensity should...

A thin film of ethyl alcohol (n=1.36) is spread on a flat glass plate and illuminated with white light. When illuminated and viewed from directly above, it shows a coloured pattern in reflection. If the only visible light reflected by a certain region of the film is yellow (lambda=560nm), how...

A thine file of ethyl alcohol (n=1.36) is spread on a flat glass plate and illuminated with white light. When illuminated and viewd from directly above, it shows a coloured pattern in reflection. If the only visible light reflected by a certain region of the film is yellow (lambda=560nm), how...

How do you find the angle of polarization? What is the formula? Its not in my physics book and I looked online and couldn't find it.

How can the electric polarization be induced by the strain gradient? It is said in some papers the strain gradient can induce electric polarization in solid materials. Why can it happen? Who can explain this phenomenon to me?

"by what factor may the glare off water be reduced when the sun is at a) 45 degrees above the horizon b)60 degrees above the horizon n.b refractive index of water is 1.33" I have derived the fresnel reflection coefficients for the cases when E is perpendicular to the plane of...

I know what polarization is in classical EM. But what is polarization in the language of photons and QM? I am thinking that it's something to do with spin.

A linearly polarized photon passes through a quarter waveplate that is free to rotate and is aligned at 45 degrees to the polarizaton direction,,, The wave plate will acquire an angular momentum,,, [Walborn, Cunha, Padua and Monken 2002, Physical review A, 65, 033818-1] This means that...

Hi i am trying to understand what is polarization and why do we need it? We use the term of polarization in university in a wireless communications course.. Plz i need some articles to study.. Thx a lot

How does Vacuum Polarization help us ?

Light can be x- or y-polarized. However, the polarization depends on the direction of the electric field (lets talk only of linear polarization). Now, what's the difference between x and y polarization? I mean why isn't there an intermediate polarization direction. One could rotate the electric...

Can someone explain to me what occurs in the Polarization with three 45 degree polarizers?

My question is, if only from a real particle emitted and absorbed virtual photons that make vacuum-polarzation (decay in virtual e-e+) do contribute to the shielding of this real particle. Or can also vacuum fluctuations that pop in and out of existence contribute to the shielding of the...

Hi i need to read somewhere about polarization. What polariation is.. Why we need it? What types of polarization exist and what are the differences.. and so on

Can somebody give me a paper where the effect of vacuum polarization is calculated for a hydrogen atom? I mean where there is a real formula to calculate "immediately" the distribution of the positive vacuum charge and negative. I didn't find something useable about this. Thanks for...

One problem in my homework assignment that I am having trouble with is: Take two ideal polarizers (the first with its axis vertical and the second, horizontal) and insert between them a stack of 10 half-wave plates, the first with its fast axis rotated pi/20 rad. from the vertical, and each...

can you measure an objects spin or position, or polarization, without actually measuring it? like can you find out if they have any of those 3, without actually measuring it?

What is Stark-broadening theory? Does it have something to do with mean free time or mean free path? How does this effect spectroscopy? How does plasma polarization shift based on the quantum-mechanical impact theory work?

I want to know if the orientational polarization should be included when you calculate the permittivity of the silicon oxide (both crystal and amorphous)?

I konw that the defect centers in a dielectric contribute to the electric polarization and thus affect the permittivity.If there is any microscopic theory can derivate the relationship between the defect centers and the permittivity?

Hey. What exactly does polarization of light mean? I researched "optically active materials" and I found that they work by rotating the polarization of light. What practical meaning does this have? Thanks!

A beam of natural light is incident (from the air) on an air-glass interface at 40 degrees. Take n = 1.5 for the glass. a)Obtain an expression for the degree of polarization of the transmitted light and compute it numerically. b)Obtain an expression for the degree of polarization of the...

can some one explain 2 me the basis of photon polarization ...?

In Nick Herbert's Quantum Reality, he describes an experiment in which light is sent through a calcite crystal which separates the photons by their polarization. In the experiment he describes, the light has a 50/50 chance of either going up into a detector or down into a different detector...

Hi, Can someone point me to a treatment of the preferential direction of emission of a photoelectron in the case of polarized incident light ? I think that there is a relationship a la cos^2 theta between the plane of polarization of the light (E-field) and the probability of emission of the...

Two polarizers are oriented at 38.8o to each other and plane-polarized light is incident on them. If only 14.6 percent of the light gets through both of them, what was the initial polarization direction of the incident light? Ok, I'm not exactly sure what this problem is asking for, do they...

http://xxx.lanl.gov/PS_cache/astro-ph/pdf/0507/0507274.pdf If quasars are at the cosmological distances suggested by their redshifts, can they conspire to be polarized similarly with respect to their line-of-sight angle to the Earth? If the universe is homogeneous and isotropic, these...

In a Raman scattering experiment, you take two spectra using a triatomic linear molecule. One spectrum is from setting a polarizer to pass vertical polarization and the other has the polarizer set to pass horizontal polarization. What should be the difference between the two spectra? What if...

How polarization influence Goos-Hanchen effect? I googled it but I didn't find it.