Questions tagged [polarization]

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

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Is it possible to create negative ions without ionization?

I read that the air purifiers that can create negative ions also increase ionization, in theory is it possible to create a negative charge/ negative ions without creation ionization similar to ...
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Can a single photon have circular polarization?

There are on this site a few questions about photons and circular polarization, but none of them give satisfactory answers: Connection between spin angular momentum of a photon and circular ...
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How can the neutron have any 'electric polarizability'?

If a neutron has no identifiable electric charge or polarization, as far as anybody has been able to determine, how can it have a value for 'electric polarizability'? Wikipedia has a value listed that ...
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What is the polarization of an EM wave after it suffers scattering?

If a linearly polarized classical monochromatic electromagnetic radiation undergoes a scattering, does the scattered electric field have the same polarization as the incident electric field? I am ...
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Spin-1 polarization vectors (massive particle)

I am reading Zee's QFT book and he is developing the field theory of photons without introducing gauge invariance. He's putting a small photon mass into the Lagrangian which he will later let go to ...
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Is there a rotation of the polarization plane in rotating refractive media?

Since there is a transverse Fresnel–Fizeau effect according to Jones, R. V. (1972). "'Fresnel Aether Drag' in a Transversely Moving Medium". Proceedings of the Royal Society A. 328 (1574): ...
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Anisotropic dielectric media and collinearity between polarization and electric field

I am trying to understand the definition of an anisotropic dielectric media. I think I understand the definition in terms of the susceptibility tensor: $$ \begin{pmatrix} P_{x}\\ P_{y} \\ P_{z} \end{...
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Why does light reflected from a surface is s polarized? Why p polarized light is refracted?

I cannot understand the physics behind the reflection and polarization-reflection on an atomic scale. What exactly happens at the boundary of two surfaces? I was studying Brewster's law and thus this ...
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Extraordinary wave [closed]

In anisotropic media, for extraordinary wave, I don't understand how can the power flow not be in the same direction as the propagation. I can't find a physical intuition for it.
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Why does metal change its color under polarized light?

I've taken two photos of a metal in an experimental setup. The first image shows the metal illuminated by a halogen-lamp from above. The second image shows the same metal illuminated by the same lamp ...
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Does polarized light scatter an electron only in directions that all lie in the plane paralel to the plane of light polarization?

If it is possible, can polarized light scatter an electron in a direction that is not paralel to the plane of polarization of the applied light? If yes does it mean that the photon is arbitrarely ...
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Superposition of electromagnetic waves in polarisation

Let's imagine an electromagnetic wave that points every direction (i.e., from $\theta = 0$ to $\theta = 2\pi$). For simplicity let's consider only the electric field vectors. The wave goes through a ...
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For whispering gallery modes with $n$ nodes, why do the $z$- and $x$-polarized electric fields have $n$ and $n-2$ nodes respectively?

I am analyzing a GaAs nanowire with a length of 2 microns on a GaAs substrate. I am interested in the modal analysis of whispering gallery modes; modes that - through a combination of total internal ...
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In simple terms, is the permittivity of free space the polarizability of a vacuum? [duplicate]

I'm having a hard time understanding the permittivity of free space in my own words. Wikipedia defines the permittivity of free space as "the value of the absolute dielectric permittivity of ...
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What could be and how to come up with a mathematical formula for the local electric field inside a blackbody cavity?

I asked a similar question here more than two years ago. I did not get an answer to my complete satisfaction. I would like to reiterate the problem again. The local electric field of a monochromatic ...
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Determining plane wave polarization given the magnetic-field vector phasor

Given the following magnetic-field vector phasor: $$\vec H(\vec r)=\left[\hat x - j\hat y\right]H_o e^{jkz}$$ I need to find the associated E-field vector phasor so that I can determine the ...
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Can a polarizer let scattered laser light pass in order to filter ambient light?

I am currently working on a project in which I need to detect the image of a line laser (I haven't choosen the laser yet, most likely a low-cost one) with a camera (most likely basic CMOS camera). By ...
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Why does the polarization type ($s$ or $p$) of electromagnetic waves effect the reflectivity and reflectivity of the light differently

So the Fresnel equations can describe the reflectivity and transmission of $s$ and $p$ polarized light and show that there is a different relationship between angle of incidence and the power ...
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Will table sugar twist polarized light?

I recently saw this awesome video by Steve Mould where he explained that a sugar solution in water will turn polarized light in the clockwise direction. The explanation basically boils down to sugar ...
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On the Measurement Problem of QM, what has the study of photon-polarizer molecular interactions yielded so far?

When a photon comes into contact with a polarizer, its wave-function can collapse along a certain basis direction. Polarizers are made of certain chemical compounds arranged in a certain structure. So ...
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Electric field applied in a dielectric material

My physics book introduces dielectric materials by considering firstly the electric effects due to polarization (without taking into account the causes of this polarization). Then the book itself ...
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Is it possible for an interference pattern to appear while experimenting with entangled photons? [closed]

An specialist in quantum information asserted that "entangled photons will never show an interference pattern", but that seems to contradict the response to another question I made here. He ...
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How could a liquid have a rotation power while the dextrogyre or levogyre molecules are *randomly* organised in the liquid?

Let's consider a liquid that contains either dextrogyre or levogyre molecules, but only a highly preponderance of one of them. Since the molecules are randomly oriented in the liquid, how is it ...
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Confusion about optic axis

In the book 'OPTICS' by Eugene Hetch it is written that, "the optic axis is actually a direction and not merely a single line". I can't understand why it is a direction, not a single line?
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Does introduction of a dielectric slab between two charges affect the force felt by the charges

Consider a situation as given in the picture: Would introduction of the dielectric slab reduce the force of attraction a charge feels (towards the other charge)? What if one of the charges is inside ...
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Electric displacement field $D$ - what do the terms in the definition represent intuitively?

In the following equation I would like to check what the terms represent intuitively (in a hand-wavey sense - I know $\underline{D}$ is not a physical thing so it's not possible to fully describe it ...
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Meaning of circularity in phase retarder definition

A phase retarder is generally some birefringent material used to modulate the phase of polarized light. A common example is a half-wave plate, which rotates linearly polarized light symmetrically ...
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Polarization of sunlight by the earth's atmosphere

I have just learned that sunlight traveling through the earth's atmosphere picks up a net polarization by collisions with molecules ($O_2$, $N_2$, etc.) that the photons encounter. One would think ...
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Why is the max. polarization of the blue sky at 90 degrees angle with the sun?

Looking at the blue sky using my polarizing sunglasses I notice an effect (details below), that seems to match well to this answer, where it is said: The greatest degree of polarisation occurs when ...
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1answer
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Circular polarizer filter wavelength dependency?

I don't fully understand the circular polarizer filter (CPL) for my camera. It contains a linear polarizer and a quarter wavelength plate (QWP). The QWP causes a time delay between the ordinary and ...
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What happens to the rest of the light that didn't get filtered by polarized film?

Suppose I used a polarized film to produce say left circularly polarized light, I wonder what happens to the rest of the light that gets absorbed or reflected away? Are those unpolarized or right ...
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Interferences of TE and TM mode light reflected once

I have derived a transfer matrix calculation for LED systems. It is known that reflection amplitudes have a 180-degree phase shift between TE and TM modes less than the Brewster angle. This makes ...
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Polarisation of light in Zeeman splitting

In the Zeeman effect, the polarization of the spectral lines is linear, if observed transversal to the magnetic field. If we observe the Zeeman effect in the longitudinal direction (relative to the ...
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Which experiment can differentiate a statistical mixture from a superposition state?

I am in trouble with polarization and entanglement. Let's consider three cases : Case 1) : Statistical mixture of $|H\rangle$ and $|V\rangle$ polarized photons Case 2) : Photons in a superposition ...
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Why does a polarized material generate a depolarizing field?

I do not understand how a polarized material (steady state, no free current, no free charge) can generate a depolarizing field. Based on https://en.wikipedia.org/wiki/Demagnetizing_field, I "...
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Question about notation used to describe photon path/position

I was watching this lecture (https://www.youtube.com/watch?v=0USje5vTIKs&t) by Professor Barton Zweibach and was having some trouble. He describes a photon in the upper path by $[1, 0]$ and a ...
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Polarization ellipse derivation

In electromagnetism, all possible monochromatic electric field polarization states can be described in terms of the shape and orientation of the polarization ellipse, which maps the locus of points ...
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Confusion about derivation and application of Jones Vector

I was watching this video (https://www.youtube.com/watch?v=KKQJIMdEEHY) to gain a better understanding about light polarization, but I was having some trouble with the derivation of the Jones Vector. ...
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Question about derivation and application of Jones Vector

I am a quantum computing hobbyist who is trying to learn about photon polarization, specifically about where the Jones vector (used to describe polarization) comes from. I was watching this video (...
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Polarised light passing a parallel filter [closed]

If a polarised light of an intensity of $I_0$ passes through a parallel (to the light) filter, what would the intensity of the light be after passing through the filter?
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1answer
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How can higher-energy beta decays have 'higher polarization'?

The higher the energy of the particles, the higher their polarization. I just cut-and-pasted the above statement from the chirality-and-helicity section of the Wiki article on 'Beta decay'. What does ...
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Phase change during polarisation

A beam of coherent unpolarised light is split into two. One is polarised horizontally, the other vertically. Will there be a phase difference between the two beams?
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Monochromatic Polarization

What does it mean when we say that the monochromatic wave is un-polarized? Is this kind of wave actually possible? What would the equation of such a wave look like? Since we can consider also that ...
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Is this combination of dielectric in series or parallel? [closed]

In this question, I was required to find the effective dielectric constant of the system. (Source:- JEE 2000). What I did was prove that the electric fields in K1 and K2 are having the same E fields ...
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What is the reason that Quantum Mechanics is random?

We know quantum mechanics gives a random result when we observe a particle that's in a superposition, but why is it random? One of the explanations I've heard is that because light comes with those ...
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Polarization of Patch antenna - Intuitive explanation

I was looking into the polarization of patch antennas (for GNSS use). I found this website (http://kempbros.github.io/antennas/Patch_Antenna_Generator/) which gives the geometry of the antenna ...
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Rotation of a polarization vector

Let's assume that I have a photon moving in the $\mathbf{k}$ direction, with polarization vector with helicity $\lambda$, $\epsilon(\lambda,\mathbf{k})$, where $\lambda=-1,1$. Can I express this ...
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How do we know from representation theory that a massless spin-1 particle has only two polarizations?

In chapter 8.2.3 of Schwartz' textbook "Quantum Field Theory and the Standard Model", the author states the following, Finally, we expect from representation theory that there should only be two ...
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Why does my TFT-LCD laptop screen display the effects in the video?

I made this video which shows what happens when I move the point of a wooden chopstick over my TFT-LCD screen, with firm pressure. I'm sure it's got something to do with the distance between the two ...
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How to get the eigenstates of angular momentum of the radiation field?

it is given the angular momentum with $J = \int x \wedge(E \wedge B) dx $. Therefore I get the operator $J = \sum_k (x \wedge k) N_{k,\lambda} $ where $N_{k,\lambda} $ is the number operator, $k$ is ...

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