Polarization characterizes the oscillations in time the electromagnetic field is doing in the plane perpendicular to the propagation direction of a wave

learn more… | top users | synonyms

2
votes
1answer
329 views

Can horizontally and vertically polarized light combine to become circularly/elliptically polarized light?

Well, we know that circularly/elliptically polarized light is made up from orthogonal components. So is it possible then to create circularly/elliptically polarized light by combining horizontally and ...
4
votes
0answers
99 views

Energy absorbed in Polarization of light

A polarizer absorbs all light that vibrates in a particular direction. Where does the energy absorbed by the "chain molecules" of the polarizer go? Does it change the structure of the molecules? Is ...
0
votes
1answer
42 views

Can we consider light from the Sun during sunrise and nightfall as polarised?

On sunrise and nightfall light looks different, more orange or more dark. Some frequencies are filtered or light travels longer. The energy corresponding to this light is obviously lower than light ...
3
votes
1answer
37 views

Recognizing linear or polarized light and seeing its direction

I was watching Walter Lewin's course, and he said he learned a way to see and recognize polarized or linear light. And i wonder what it might be? What is the tricks?
0
votes
1answer
78 views

Difference between twofold infinity and simple infinity in relation to quantum mechanics

$\newcommand{\k}[1]{\left | #1 \right\rangle }$ In his "The Principles of Quantum Mechanics", Paul Dirac states: $$c_1\k A + c_2 \k B = \k R$$ Given two states corresponding to the ket vectors $...
0
votes
0answers
32 views

Why does vertical polarizer absorb the vertically polarized waves?

They explain that vertical wires serve as the secondary transmitter: the waves induce since oscillations of electrons in the wire effectively absorbing the wave. Ok, let's believe that wave is ...
1
vote
2answers
79 views

What is the relation between charge and polarization?

On one hand, in this "Measurement of polarisation" lab manual, polarization is surface charge density, $P=\frac{Q}{A}$, in other words, charge an polarization are essentially the same thing. On the ...
1
vote
1answer
414 views

$\pi$, $\sigma$ - atomic transitions with respect to the magnetic field axis

I am confused about the atomic transition with different polarized lights. I post the pictures as follows. There are four cases. In case 1, the right-handed circular polarized light ...
1
vote
0answers
59 views

angular momentum of electromagnetic wave

EM waves that are circularly or elliptically polarized have angular momentum. Is there any experiment that proves/shows this ? like shine a light on something and it rotates ? The correspondence is ...
0
votes
0answers
70 views

What is the significance of 'energy ellipsoid'?

Well, today I was reading Tensors by Feynman in his lectures, where he introduced the concept of 'energy ellipsoid'. This is the following excerpt: [...] the polarization tensor can be measured ...
1
vote
1answer
58 views

Why does work done for polarization per unit volume contain $1\over 2$as in $\frac{1}{2} \mathbf E\cdot \mathbf P?$

Work done per unit volume to change the polarization from $0$ to $\bf P$ is given as the integral of $\mathbf E\cdot d\mathbf P'$ as $$u_p= \int_0^{\bf P}\mathbf E\cdot d\mathbf P' \;$$ integrating ...
2
votes
2answers
41 views

Polarized light in single mode fiber

In single mode fiber the light propagates in two orthogonal planes. Input will be linearly polarized light, which state of polarization will be on output and why? And if there will be some different ...
0
votes
1answer
22 views

Stokes Polarimetric Measurements

In Stokes polarimetry, a method is presented in "The Handbook of Optics", Chp 22 by Chipman under light measuring polarimetry that presents a data reduction equation for finding the 4 Stokes ...
-1
votes
1answer
56 views

Where does $\tan 2a = \frac{B}{A - C}$ come from? [closed]

I was reading about elliptical polarisation and stumbled across an equation involving the rotation angle of the ellipse. It has the form $$\tan(2a) = \frac{B}{A - C}$$ where $B$, $A$ and $C$ are the ...
0
votes
2answers
127 views

Effect of polarizer on light's intensity

If you take unpolarized light and pass it through a polarizer, it's intensity will be half of what it was (ideally). Following Malus' Law I'd issume that if I pass this now polarized light through ...
0
votes
0answers
49 views

Polarization Of Light From A Calculator Display

Okay so I couldn't see anything that matched this, partially because I do not know what aspect of polarization it fits into, but in Physics class we did a practical and as part of an extra bit of it ...
0
votes
0answers
51 views

Two spheres (one positive, one negative) - electric field

I posted yesterday about a problem I had and I have managed to solve one of the two I think (Here is the original post: Dielectric field in a homogenous electric field ). I didn't want to edit the ...
1
vote
0answers
42 views

Dielectric field in a homogenous electric field

I'm working through my workbook right now and currently am stuck on the chapter about dielectrics. The term $\vec{E}=\frac{3}{\epsilon_r +2}\vec{E_0}$ was introduced without a proper proof. Instead ...
0
votes
0answers
18 views

Are solar cells designed to be isotropic to polarization?

The typical performance charts I see report efficiency (IPCE) as a function of wavelength. Since the light coming from the sun has random polarization, wouldn't a solar cell with anisotropic ...
2
votes
1answer
51 views

which is correct way to find error in degree of linear polarization?

I have a set of "degree of polarization (DOP)" values for a star. Assume there are 10 DOP values in the set. DOP is defined as square root of sum of squares of fractional Stokes parameters, namely q ...
9
votes
3answers
1k views

DIY Quantum Eraser Experiment by the Scientific American: Is this really quantum?

Click here for the publication. Having performed this experiment, I have gotten clean results. Essentially, a double slit is made by putting an photon beam in the way of a wire with orthogonal ...
0
votes
0answers
35 views

What is the exact meaning (distribution) of unpolarized light?

Are there statistical properties to unpolarized light? For example, is the polarization of individual particles in an unpolarized beam has a normal distribution or a uniform distribution etc. of ...
2
votes
1answer
107 views

Optics phenomenon with my glasses?

When I look through my glasses toward the extreme left, a very odd and intriguing phenomenon occurs: The border of everything I see is lined with a hazy blue lining on the left and a hazy yellow ...
0
votes
0answers
36 views

How are the photon and electron entangled in this situation? [duplicate]

If one of the photons in an entangled pair produced in parametric down conversion is absorbed by an electron or atom than this elecfron must be entangled with tge other photon. In what degree of ...
4
votes
2answers
3k views

Effect of temperature on optical rotation of sugar solution

How does temperature affect the specific optical rotation of sugar solution at constant concentration and why? If, for example, the temperature is increased, will the optical rotation for a given path ...
1
vote
1answer
117 views

Why do 3d movies have a red and blue “double image”? [closed]

My question is why do 3d movies have a red and blue"double image" that is basically just a few inches to the right and left of the real image. And how does this help us see the image as "3d". Does it ...
0
votes
1answer
34 views

Polarized light microscopy

Why is polarized light used in microscopy for the analysis of rocks(for example)? Why not use unpolarized light? What is it with polarized light that makes the analysis of rocks better? Edit: please ...
1
vote
1answer
77 views

Electric field vector in visualization of polarization of EM wave

When we were taught polarization at the high school level, we were told that during polarization, we should consider the EM wave being axially or planarly filtered (e.g. by a polarizing sheet with ...
1
vote
0answers
95 views

Spin and polarization, QM vs QFT

On page 34 of A. Zee's book QFT in a Nutshell, he states: I expect you to remember the concept of polarization from your course on electromagnetism. A massive spin 1 particle has three degrees of ...
0
votes
2answers
68 views

Does measurement really affect polarization?

The answer must be yes but I have trouble dealing with the explanation given here. As you can see the light is polarized at an angle theta to x axis. After it passes the polarizer A which is along x ...
7
votes
3answers
1k views

Is a single photon always circularly polarized?

While trying to understand polarization in quantum field theory, I wondered how a single photon could go through a linear polarizer. I found a paper which asked "Is a single photon always circularly ...
0
votes
1answer
41 views

How can slightly elliptically polarized light pass through a polarizer set to pass linearly polarized light?

How can slightly elliptically polarized light pass through a polarizer set to pass linearly polarized light? And what will be the corresponding change in intensity?
1
vote
1answer
36 views

What are some of the empirical proofs of electromagnetic polarization? [closed]

I am aware of how polarization follows from Maxwell's equations, and how it is possible in transverse waves in general. I also know that Huygens, in his great Treatise on Light, first discovered and ...
1
vote
3answers
144 views

Does orbital angular mometum has no meaning for single photons?

In the quantization of free electromagnetic field, it is found that the left-circularly polarised photons corrsponds to helicity $\vec{S}\cdot\hat p=+\hbar$ and right-circularly polarised photons ...
0
votes
1answer
33 views

Rotation of polarization through optical activity

When a vertically polarized beam of light is incident on an optically active substance and rotated through some angle $\theta$, how is the degree of rotation related to the length of the path through ...
8
votes
3answers
11k views

Is wearing 3D glasses from the cinema as sunglasses hurtful to the eyes?

I heard a few times that using them as sunglasses is hurting the eye since UV light is not filtered, but the pupil is wider than it would be w/o wearing them because the visible light is dimmed. I ...
0
votes
1answer
51 views

Verdet Constant and optical pumping

While studying Faraday rotation (linear magneto-optic rotation) I came across a fact that Faraday rotation can be enhanced. Verdet constant which depends on the wavelength can be enhanced as change in ...
2
votes
2answers
67 views

Which photons pass through a circular annulus?

Passing light through a circular sieve: Well, actually, let’s think about radar or microwaves with a wavelength of order a centimeter or two, so you can tailor your aperture, say by etching a silver ...
1
vote
2answers
538 views

Why do charged objects attract pieces of paper, but not pieces of metal?

I do not understand one concept in Physics: why charged objects (eg. a charged rod or comb) attract pieces of paper when brought close to them, but do not attract pieces of metal. I know that the ...
0
votes
1answer
54 views

Flip of polarisation of light

Consider an optical experiment with photons or light pulses. Is there an optical element that acts in the polarisation degree of freedom like the unitary $$ U = \frac 1 {\sqrt 2} \begin{pmatrix} 1 &...
0
votes
1answer
1k views

Why isn't sunlight polarized?

My guess: Because polarization happens only when amplitude exists and because the sun is so big that the light rays arriving on earth literally come in all direction, their amplitude is then ...
0
votes
0answers
68 views

Why can i see LCD screen trough my linearly polarized glasses

I have a Samsung Galaxy Pocket Neo GT-S5310, it uses an LCD screen. Wikipedia says that all LCD's emit a vertically polarized light However even if I turn my glasses 90 degrees, i can still see the ...
1
vote
2answers
239 views

Quantum theory of light

What's the scattering matrix for a PBS (polarization beam splitter)? Is it just unitary? If one polarization never couples into another polarization (then there's a lot of zeroes in that 4x4 matrix) - ...
1
vote
1answer
55 views

Polarization of the Sky?

I was hiking and noticed as I tilted my sunglasses (which are probably polarized), right at the horizon where the sky was against a mountain, it would change from lighter to darker blue. This only ...
1
vote
2answers
75 views

Is it possible to reverse the polarity of already polarized light using passive materials?

For a gizmo idea that I have, I want to understand if it's possible to "reverse/turn" the polarity of light using passive, relatively thin and cheap films, similar to what we see in 3d glasses or TN ...
-1
votes
1answer
72 views

How to polarize a laser beam

I'm working on an optic project that I need my laser beam to be polarized. Do you a simple way to polarize my laser beam?
1
vote
1answer
57 views

Circular polarisation destroying interference pattern for double slit

I have been trying to mathematically explain the empirical result that putting orthogonal polarisers (quarter-wave plates) behind the two slits of a double-slit setup will erase the interference ...
0
votes
1answer
69 views

Interference of Beams with Different Polarizations

I have read in many places that orthogonally polarized light beams do not interfere. However, I also know that orthogonal vectors, such as force, do affect each other and give a resulting force. So, ...
1
vote
1answer
62 views

Connection between Polarization and Coherence in optics

It is not completely clear to me how the notions of polarization and coherence, in optics, work together! I quite understand both of them but it's still hard to grasp their deep connection. I'm quite ...
1
vote
0answers
66 views

Why are most antennas in cellular networks +/- 45° polarized?

I've just been asked a strange question that I cannot find an answer to (even on the internet it seems I can't find any explanation for this) and I ended up wondering why most of the antennas which ...