# Questions tagged [reflection]

The tag has no usage guidance.

1,082 questions
Filter by
Sorted by
Tagged with
8k views

### How are classical optics phenomena explained in QED (Snell's law)?

How is the following classical optics phenomenon explained in quantum electrodynamics? Reflection and Refraction Are they simply due to photons being absorbed and re-emitted? How do we get to Snell'...
3k views

### How can a green laser be reflected as orange?

My friend recently bought a high-powerd pocket laser pen (from China). It is green, and reflects off most surfaces as green. On some orange surfaces, it reflects orange instead. That is to say, we ...
15 views

### Reflection coefficient phase using Kramers Kronig, formula equivalence

Why are the following two formulas for the phase of the reflection coefficient equivalent (according e.g. to [1])? \begin{align} \Theta(\omega_0) & = - \frac{\omega_0}{\pi}P\int_{0}^{\infty}\frac{...
48 views

### Law of reflection of a moving mirror in special relativity (velocity perpendicular to the normal)

I have seen this question about the law of reflection in special relativity, and it is shown that, if you have a mirror moving in the opposite direction to the mirror's surface normal, the law of ...
514 views

### Geometrical optics problem [closed]

I Just wanna know the general approach to these problems, Two plane mirrors of length L are separated by distance L and a man $M_2$​ is standing at distance L from the connecting line of mirrors as ...
26 views

### Change of Young double slit pattern after a reflection

I made a Young double slit experiment on sunlight that showed clearly the pattern of maximum and minima demonstrating the wave aspect of light.Anyway, if, beyond the double slit the light is ...
85 views

### Does the accelerated mirror violate the energy conservation principle within the framework of special relativity?

I have designed a thought experiment for which I could not find a convincing resolution as of yet. Assume that a plane mirror is uniformly accelerated (Born rigid acceleration) along its normal, and a ...
130 views

### Cube Beam Splitter Ratios in Reverse

Good day to all, I the following diagram is a non-polarized beam splitter cube with a 10:90 (R:T) split ratio. The questions I have are: that when light comes back does the 90°, R path still have a ...
101 views

### Can light travel through a maze? [closed]

I want to manufacture a light proof enclosure. I need to understand: if I design a cap with a "U" section profile edge and the body with "T" or "U" section profile edge, will light be able to get ...
56 views

### Reflection of an under-water-object

I saw a photograph of a polar bear who is under the water surface. I would like to receive an explanation about the reflection of the polar bear on the water surface, which creates a second image.
26 views

### How does reflection work at a quantum level? [duplicate]

Thinking of light in corpuscular form, how does the bouncing of a photon off a reflective surface work? Is it the same photon bouncing off, or is it absorbed and re-emitted? If it's bouncing, does it ...
104 views

### 100x magnifying optics system for short laser pulse

I am now designing an experiment that consists of a 400 nm short pulse (~300 fs). In the experiment, we need to magnify the transverse profile of the pulse by 100x. That's the problem. I was ...
20 views

### Do dieletric mirrors and other reflective surfaces have a maximum intensity to which the absoprtion coefficient increases?

That is, if you shine a laser at a dielectric mirror so that the intensity(photons/seconds*cm^2)becomes sufficiently large, the scattering of the photons off the electrons in the surface atoms becomes ...
292 views

### Mutilple beam reflection question in Fabry-Perot cavity

Just having some trouble with a question about Fabry-Perot intereferometers. Here's the first part of the question: Consider a beam of light undergoing multiple reflections in a Fabry-Perot cavity ...
140 views

### What is the relation between Reflectance and Intensity?

I am just reviewing Fresnel's equations where Reflectance $R$ is equal to $$R=|r|^2$$ where $r$ is the complex reflection coefficient. Is there an equation that relates $R$ to intensity or is there ...
2k views

### Why don't E&M fields change orientation after hitting a surface?

In essentially every derivation of the Fresnel equations, the general problem of radiation hitting a surface at a certain angle is broken into two parts (out of which we hope the solution any general ...
40 views

### What's the intuition for the reflection of a quantum particle at a potential step equal to the particle's energy?

While doing the problem of potential step, I saw that if the energy of the particle is equal to the potential energy of the step, then the wave function is a constant, or to say the probability ...
155 views

### What happens when one side of a convex lens is made fully reflecting?

Assume that I have got a bowl half-filled with mercury. In this bowl, I place a convex lens which make one side of the lens fully reflecting. What will happen to the lens, will it behave like a ...
298 views

### Why does a street light cast a wavey shimmer across the water (at night)

You will have to zoom in. Why is the reflection a wavey one? Could someone explain how this is occurring, to the layman, (with the style of feynman if possible -heh) :)
20 views

### Fermat's principle of least time for reflection and refraction [duplicate]

In discussing geometrical optics, Fermat's principle of least time is often used to solve problems and is generally used as a replacement of laws of reflection and refraction. Fermat's principle is ...
82 views

### Why can't two truly identical experiments on quantum scale give the same result?

When we refract light on air/water interface, some part of light is reflected while some of it gets refracted. My question is when we consider light as a photon and send it (photons) one by one, what ...
38 views

### Image formation of object on itself by a system of a lens and a mirror

Suppose there is a lens and a mirror. An object is placed in front of this system (nearer to the lens). If the final image of object (refraction, reflection and again refraction) is formed on the ...
23 views

### Parallel rays hitting a parabolic mirror at an angle [closed]

I was thinking about parallel rays hitting a mirror that has a parabolic horisontal cross-section and a linear (straight) vertical cross-section. I can't understand what would happen if the rays came ...
39 views

### Why do the LINES in a vertical soap bubble get thinner as we go down?

I understand that the soap bubble gets thicker at the bottom of the bubble due to gravity, resulting in a complicated array of different colors of different wavelengths being constructively and ...
55 views

### 3D reflection of a ray on a cylindrical mirror

I am trying to calculate the reflection of a ray on a cylindrical mirror in a three-dimensional space. To achieve this, can I apply the laws of reflection separately in xy and xz planes (as in the ...
31 views

### Layer of material that transmits light in one direction and absorbs it in the other direction

I am looking for a material (or layer of materials) which transmits light coming from one side and absorbs light coming from the other side. The absorption should be as good as possible and the ...
1k views

45 views

### Images created by a pair of perpendicular mirrors

Let's assume we're given a pair of perpendicular mirrors. Let us set a system of coordinates as shown on the picture - the position of an object is given by $(x_p, y_p)$. Of course we would observe ...
139 views

### In diffraction When wavelength is less than slit width then does the scattered light gets absorbed & emitted from the wall or just rebound?

I know that when the slit width is less than that of wavelength then the slit will act as a point source and scatter the light in all directions. But my question is that during the scattering of ...
175 views

### Are there Optical Magnetic Mirrors (OMMs) which reflect via interaction with the magnetic field?

The most familiar mirror relies on reflection from a metal, where the very strong interaction of the electric field component of the EM wave with the conduction electrons produces a reflected wave. ...
222 views

### Why doesn't sound wave cancel out waves of same frequency after reflecting from the ear

We just finished our sound waves class at my university. I was taught that reflection of sound waves from an elastic boundary is accompanied by a phase change of $\pi$ while that from a rigid boundary ...
56 views

### Are metals more reflective at lower temperatures? [duplicate]

I understand that when metal gets hot it loses its reflective properties, but does that also mean that the colder the metal is the more it reflects?