# Tagged Questions

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### 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 ...
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### Are the fast axes on Thorlabs quarter-waveplates mislabeled?

Some members of my lab are performing a polarization-sensitive experiment where they need to use a quarter-waveplate (QWP) with the fast axis in a specific direction. In the process of carefully ...
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### What happens when a polarized light get reflected by a rough dielectric material?

I have a polarized light (lets say p polarized) which happens to undergo scattering when it is obstructed by a rough opaque dielectric material. What will happen to polarization? Will some part of it ...
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### Passing Polarized light through multiple polarizers in series

This is a question that has been troubling me from many days: Suppose we pass a linearly polarized light through a system of 3 successive polarizers. The 1st polarizer is offset 30$^{\circ}$ from the ...
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### What is the effect of total internal reflection on polarized light [closed]

Total Internal Reflection causes phase change of a light beam. I searched for effect on a polarized light beam by Total Internal Reflection but could not find much. I am assuming polarization does not ...
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### Question about the wave nature of light

I quote from my textbook, " Consider two vertical slits S1 and S2 placed parallel to each other, and a string is passed through them. The end B is fixed and A is given jerks perpendicular to its ...
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### When polarized light hits a polarizer, what happens to the polarization which is not transmitted?

It is typically said that in polarization of light only those waves can pass through a polaroid which has a plane of vibration parallel to the axis of polaroid. My question is: what happens to the ...
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### Is my simulation result for unpolarized light correct?

This is a follow-up of this question. After that, I picked up some knowledge of FDTD (an algorithm for solving Maxwell's equations) and simulated following scene: Pic 1 As the picture shows, a ...
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### Polarization effects of second-harmonic generation (SHG)

In one of my labs, we were using an Nd:YAG at 1064 nm and we put it through a KTP nonlinear crystal to perform SHG. We noticed that before the crystal, the 1064 light was unpolarized, but the 532 ...
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Describe the state of polarization represented by (here w = omega and TT = pi) a) $E_x = E\sin(kz - \omega t)\,\& \,E_y = E\cos(kz - \omega t)$ b) $E_x = E\cos(kz - \omega t) \,\&\, E_y = ... 2answers 133 views ### Optics - Faraday Rotator using waveplates I'm trying to replicate the effect of a 45° Faraday rotator using a series of waveplates instead. I've encountered some difficulties using the jones matrix notation, the main book I'm using is: ... 2answers 59 views ### Can you replace the backlight of a thin film transistor (TFT) with a mirror? I basically know how TFT' displays work. They have on both sides a polarizing foil, in 90 degrees with the crystals in the middle modifying which light particles should pass through or not. The light ... 2answers 161 views ### Optics Brewster's Angle Reflection Intensity An incident unpolarised light beam of intensity$I_{0}$strikes glass plate B at Brewster's Angle. The reflected light travels vertically and strikes a second glass plate A, again at Brewster's Angle. ... 1answer 98 views ### How does one calculate the polarization state of random light after total internal reflection How does one calculate the polarization state of random light after having been totally reflected by a single dielectric interface? Please consider pure specular reflexions from a plane interface ... 1answer 67 views ### Polarization in Nicol prism My book reads "When unpolarized light is incident on nicol prism (made of 2 crystals joined by Canada balsam a type of glue) it divides into 2 rays, both rays are plane polarized and electric field ... 1answer 249 views ### Partially polarized light with jones vectors? I have read that polarized light is treated by Jones vectors and that to treat partially polarized light you have to use Stokes vectors and mueller matrices. Nonetheless, the optics notes that my ... 0answers 83 views ### Superposition principle and polarization I am reading an optics book (Physics of Light and Optics by Peatross and Ware) that asserts this: A beam of light can always be considered as an intensity sum of completely unpolarized light and ... 0answers 69 views ### How to explain polarization in Zeeman effect In the Zeeman effect, when we observe along the$B$field, the polarization of light should be circular polarized. It can be understood by the conservation of angular momentum.$\Delta m=0$can not be ... 1answer 279 views ### Polarized sunglasses: should the axes in both lenses be parallel? See the pictures below. A pair of sunglasses I recently purchased has the polarization axis in one lens offset about 20 degrees (by eyeball estimation) from the other. I don't have much experience ... 2answers 162 views ### Difference in perception of unpolarized and polarized light What is the difference in perception of polarized light and unpolarized light? What difference does polarized light cause to our eyes? 2answers 229 views ### About partially polarized light and the degree of polariztion When I was taking Optics course, I found there were several questions about polarization of light. I use the textbook of Hecht. It seems that the definition of degree of polarization may be not so ... 1answer 72 views ### Creating small polarised scientific lenses? How would I go about creating small polarised scientific lenses? Thinking 5mm by 5mm, with a light-source behind it for the purposes of reducing (polarised) surface reflection (assisted with a ... 0answers 57 views ### Can coherent light also be polarized? I need to know if it is possible to polarize coherent light using a Wollaston prism. And would the resultant (2) beams of polarized light still be individually coherent? 1answer 66 views ### Can polarization effect the coherence length? I'm taking an optics lab in which I'm required to construct an interferometer, and measure the wavelength of a laser, and the coherence length of the light emitted from a candle fire. Now, I've been ... 1answer 77 views ### Depolarisation of Light in Optical Fibre I have a question for which I can't seem to find a solid answer in literature and wondered if anyone could offer advice or reliable references please: How does light depolarise in ... 3answers 2k 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 ... 2answers 268 views ### Unpolarized light vs. randomly rotating polarized light? I am confused with physical picture about unpolarized light. Is unpolarized light very fast rotating polarized light? or co-existing state of two orthogonal polarization? (or something else?) If ... 1answer 180 views ### electric field of unpolarized light after reflect? Reflection and transmission (Fresnel equation) of polarized light are treated in many optics or electromagnetism books. If$E_s$and$E_p$is incident electric field with s-polarization and ... 1answer 671 views ### Are these sunglass lenses linearly polarized or what? This is a difficult question to phrase, so please bear with me. I found some cheap sunglasses and pulled out the plastic lenses which are polarized. For clarity, I have labeled them as lens-1 and -2 ... 2answers 121 views ### Polarization of Light How do materials polarize light? I know that they polarize light in the same plane, but light has two perpendicular directions with the two fields, so which direction is reflected and why? And if ... 1answer 93 views ### Reflection of a polarised beam The past days I've been trying to understand how AutoFocus(AF) works on photographic cameras. There is a statement that says AF systems are polarisation sensitive. This means that they can only work ... 1answer 515 views ### Three polarizers, 45° apart If light is passed through two polarizing filters before arriving at a target, and both of the filters are oriented at 90° to each other, then no light will be received at the target. If a third ... 1answer 115 views ### How can a Jones vector give linear polarization along an axis? If we represent a Jones vector by two complex-valued exponentials,$J_1 = e^{i \phi_1}$and$J_2 = e^{i \phi_2}, how can this ever give a polarization along the x-axis? We write such a polarization ... 1answer 192 views ### double slit experiment with two opposite quarter waveplates Consider the usual double slit experiment involving laser and a double slit and a screen. Now place in front of the left slit a quarter waveplate (let's call it QWP1) that changes a certain linear ... 1answer 328 views ### 3D movie glasses making white light look red and blue While waiting for a 3D movie to start, I was playing with the glasses they give you. I understand each lens has different polarized filters, so the left and right superimposed images on the screen go ... 1answer 220 views ### Filter out polarized light Unpolarized light enters the polarizer and gets polarized at one certain angle. If we place an analyzer behind the polarizer and align them, we observe that all light is transmitted. If we rotate the ... 1answer 163 views ### How would one generate Brownian light? What would it look like? When light is an equal mix of all visible frequencies, we call it white light. By analogy, sound that is a mix of all audible frequencies is called white noise. For sound, there is an additional ... 2answers 474 views ### Jones vector and matrices With Jones vectors and matrices one can describe the change in polarization of a EM wave. What is the convention of the reference coordinate system; Is it fixed or does it change whenever the ... 2answers 657 views ### Circular polarization of variable-frequency light by 3D cinema glasses A dominant method to obtain 3D images in the cinemas seems to be circular polarization. Separate pictures are projected with (alternating) circular polarization filters and passive glasses of the ... 1answer 397 views ### Are circular polarizations a basis for any light polarization? I was trying to solve an exercise in classical optics, consisting in finding the type polarization of certain field profiles. And, by analyzing this one:$E_x(z,t) = |E|sin(kz-\omega t)\\ ... 3answers 935 views ### Liquid crystal shutter with >90% transmission? Today's liquid crystal shutter glasses, when in the "transparent" state, exhibit only 40% light transmission. They work using two polarizer layers, one which is liquid crystal and goes {vertical ... 1answer 330 views ### Is there a simple model explaining Faraday effect? I find magneto-optical effects fascinating, and especially the Faraday effect. But most sources only give a phenomenological description, while I want a deeper explanation of its mechanism. Is there a ... 1answer 914 views ### What are the properties of the partially polarized light on refraction? When a ray of ordinary light is passed on the surface of the water the reflected light will be completely polarized( vibrations in one plane). My question is what will be plane of vibration in the ... 2answers 195 views ### Liquid crystal polarizes light reflection question I was hoping someone could help me with understanding why a row of polarizes reflects a light wave when the whole row is the same length as the wavelength of the light. I pretty much get the ... 1answer 496 views ### Why do polarized sunglasses remove (most) reflections on car windows? Why do polarized sunglasses remove (most) reflections on car windows? I know that both lenses of polarized sunglasses are polarized in the same direction and I can see that reflections in my own ... 1answer 324 views ### Are two polarization states of light coherent? Let's consider a situation: we have distant point source of unpolarized light in certain non-zero range of wavelengths (it's polychromatic). Let's divide this light into 2 beams depending on ... 1answer 797 views ### How to compute the intensity of a polarized wave going through a polaroid? If an electromagnetic wave is linearly polarized, the intensity of the light that goes through a polaroid is proportional to the square of the cosine of the angle between the polarization plane and ... 1answer 469 views ### Polarization rotation: Jones Matrix that maps Horizontal to right circular I am looking at the Poincaré sphere and I am trying to compute a Jones matrix for a particular rotation. Specifically, I would like it to perform the following maps:$O :|H \rangle \rightarrow |R ...
Assume polarised light travels through an optically active medium (e.g. water with lots of sugar) with the specific angle $\alpha_s$ of depth $d$ at which end it is reflected (so in total it travels ...