Questions tagged [reflection]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
3answers
66 views

Reflections of light that reach our eyes

$S$ is a light source, $E$ is the eye of an spectator. There are two points $A$ and $B$ on a plane. Since incident angle and reflection angle is equal for all cases, how can the light reflected from ...
3
votes
0answers
89 views
+100

Is real image always inverted and virtual image always erect?

Question: Is real image always inverted and virtual image always erect with respect to the object? Is there any single optical device (a mirror, or a lens, or anything else) which could produce a ...
1
vote
1answer
34 views

Overcoming the critical angle of total internal reflection?

Incident light on an interface between an optically denser medium (refractive index $n_1$) and a less dense medium ($n_2$) will undergo total internal reflection (TIR) if the angle of incidence (AOI) ...
1
vote
0answers
18 views

Relation between energy, frequency and wavelength [duplicate]

Frequency $f$ and wavelength $\lambda$ of light don't alter after reflection. If that is the case, then energy should also not alter after reflection as $E=h f$. But energy gets altered after ...
-3
votes
1answer
37 views

Number of reflections on inclined mirrors [closed]

If two mirrors which are inclined at an angle $\theta$, and a ray of light is inclined at one of the mirror at an angle $\alpha$. How many reflections would the ray require to escape from the system, ...
2
votes
4answers
50 views

About the foci of concave spherical mirrors

I am a high school student trying to learn spherical mirrors, and I’ve been told that the focal point is the equidistant point between the center and the surface of the sphere. I played around with ...
0
votes
0answers
26 views

Magnify a mirror reflection using a magnifying lens

Is it possible to magnify the image reflected from a mirror using a magnifying glass? Like if the mirror is inclined 45 degrees in respect to the beholder, and the lens is placed in front of the ...
1
vote
1answer
39 views

Advantage of using a polygonal mirror with larger number of faces in Michelson method of measuring the speed of light and its value

The following image is from Concepts of Physics by Dr. H.C.Verma, from the chapter "Speed of Light", page 447, topic "Michelson Method": For higher image resolution click here. The following ...
2
votes
2answers
42 views

Number of reflecting surfaces in the rotating mirror in the Michelson method of determination of speed of light

The following text is from Concepts of Physics by Dr. H.C.Verma, from the chapter "Speed of Light", page 447, topic "Michelson Method": For higher image resolution click here. Michelson ...
0
votes
0answers
18 views

How does the use of concave mirror over plane mirror advantageous in the Fizeau method of determination of speed of light?

The following text is from Concepts of Physics by Dr. H.C.Verma, from the chapter "Speed of Light", page 445, topic "Fizeau Method": One can use a concave mirror in place of the plane mirror [...
0
votes
1answer
34 views

mirror symmetry of spin-1/2 wavefunction: Definition of the reflection operator

I would expect from a reflection operator $\hat{M}$ to leave a wavefunction unchanged if two times applied, thus $\hat{M}^2=1$. However, for a spin-1/2 particle this is not the case when following the ...
2
votes
1answer
89 views

Image Formation by a Spherical Mirror: angle change from $-\theta_2$ to $\theta_2$?

I am currently studying the textbook Fundamentals of Photonics, Third Edition, by Saleh and Teich. In a section titled Paraxial Rays Reflected from Spherical Mirrors, the authors derive the mirror ...
2
votes
2answers
28 views

Can mirrors give rise to chromatic aberration?

Chromatic aberration is a type of image defect due to the fact that different wavelengths of light have different refractive indices. In almost all sources I read so far, this type of optical ...
0
votes
2answers
46 views

Polarization of light and Brewster's angle in internal reflection

In almost all sources I read so far, Brewster's angle is defined for light incident on an optically denser medium from an optically rarer medium. Is the concept of Brewster's angle applicable when ...
0
votes
1answer
33 views

How can the speed of light at the interface separating two media be equal to that of one of the media?

When light passes from an optically denser medium to an optically rarer medium, it bends away from the normal in accordance with the Snell's Law of refraction $\mu_1\sin i =\mu_2\sin r$ where $\mu_1$ ...
3
votes
6answers
96 views

Can we keep a photon bouncing of mirrors for a long time (eg days)? [duplicate]

If a photon is sent into a box with perfect mirrors aligned in a way that it won’t ever be reflected out, is it possible to hold the photon for extended lengths of time with its quantum properties ...
1
vote
2answers
42 views

A doubt in trigonometric approximation used in the derivation of mirror formula

The following text is from Concepts of Physics by Dr. H.C.Verma, from chapter "Geometrical Optics", page 387, topic "Relation between $u$,$v$ and $R$ for Spherical Mirrors": If the point $A$ ...
2
votes
1answer
44 views

Does grounded sheet metal reflect or absorb radio waves?

By "radio waves" I mean waves used for radio transmission appliances, e. g. within 1 MHz to 10 GHz. If the size of the metal sheet makes a difference, please answer for a infinite sheet and a fridge. ...
0
votes
1answer
27 views

Can I destroy a star faster by trapping it in a spherical mirror? [duplicate]

What would happen, if I were to trap the Sun in an almost perfectly reflective spherical mirror? I'm assuming this would accelerate the life of the sun and reduce the timescale required to turn it ...
-1
votes
1answer
80 views

We can see our face in a mirror, but why not clearly in a aluminium or steel? [duplicate]

We can see our face in a mirror. But why can't we see our face clearly in a aluminium or steel?
1
vote
1answer
72 views

Why are 8 images formed for a object kept symmetrically between two mirrors kept at angle 50°?

Let us consider two mirrors $M_1$ and $M_2$ kept at $50^\circ$ with each other. An object $O$ is kept symmetrically between the mirrors making angles $25^\circ$ with each. Now the number of images ...
1
vote
1answer
30 views

Echoes and Pitch Change

I encountered something strange regarding echoes and pitch. One Fourth of July , I saw rockets reach a height its hard for me to gauge. I'd call it two to three dozen meters. I had noticed that ...
1
vote
0answers
29 views

Omnidirectional refraction of a ray light

Is there such a material or construction of refractors or reflectors such that a ray or rays of light entering into the medium are redirected so as to exit the medium in a nearly all directions? For ...
0
votes
1answer
29 views

Why exactly does a material reflect/absorb/refract light? [duplicate]

What is the property of the molecules of the material that causes it to behave differently when it interacts with light. Is it the frequency of the material? I was thinking that the resonant ...
1
vote
0answers
33 views

Snells Law derivation from Plane Wave incidence

I am trying to derive snell's law from plane wave incidence by imposing the condition that the phase of the incident, reflected and transmitted wave at the point of incidence must be equal. Here's ...
2
votes
2answers
98 views

Is it really necessary to use laser as a source of light in Lloyd's mirror?

After learning about Lloyd's mirror from Wikipedia, I watched a video demonstration of the experiment in YouTube where a laser was used as the light source. In Young's Double Slit Experiment (YDSE), a ...
4
votes
1answer
54 views

Reflections in lake vs swimming pool

Why do lakes reflect objects better than swimming pools? Is it because light reflects from light but not dark bottoms, thereby obscuring reflection?
0
votes
1answer
55 views

Will the mirror reflection make the interference pattern disappear?

I have read this question: When light reflects off a mirror, does the wave function collapse? where dmckee says: Now, even giving a precise statement of what makes a "measurement" is non trivial, ...
0
votes
1answer
18 views

Radar Wave Reflection — How can we justify coherent radar?

How can we model a radar wave's reflection from a target? Will the phase of the return be different from the signal that gets sent out? For instance, suppose our radar was transmitting the following ...
2
votes
0answers
29 views

Why does the reflected light have a specific direction? [duplicate]

If a light incident on a smooth surface ,then light reflects. Why does the reflected light goes in a direction such that angle of incidence and angle of reflection to be equal and reflected ray be in ...
8
votes
4answers
564 views

Emission vs reflection

Is there any difference in the way we perceive two objects, one that reflects white light and another that emits white light?
1
vote
1answer
37 views

Reflection of light on white objects

How do objects really reflect light? We all know that if light comes to an object some of it's wavelength would get absorbed by the object as the form of thermal energy, and some would be reflected ...
1
vote
1answer
65 views

Are all macro reflections caused by electrons?

In everyday life, almost everything is at least somewhat reflective. Metals are the best (or mirrors, which are covered with metals), next go plastics per say, then glass, painted/varnished wood, and ...
3
votes
1answer
54 views

What colour would a green object appear in orange light?

What colour will a green object appear when it has an orange light shining on it? As far as I can work out if the light source is from e.g. a TV or monitor using the RGB system the orange light would ...
0
votes
2answers
43 views

Does a parabolic diffuse surface reflect more light than a flat, rectangular surface in 2D (see figure)?

Which surface reflects more light into the black collecting surface, considering both the light collecting surfaces have the same length? Is there an equation that could help me determine this? I'm ...
2
votes
1answer
35 views

Energy conservation when light reflects from mirror [duplicate]

Suppose we have a perfectly reflecting mirror which reflects 100% of the light incident on it. When a light beam falls on the mirror normal to the surface it will reflect in opposite direction from ...
0
votes
0answers
16 views

How effective were girandole mirrors?

In the early 19th century a furnishing sometimes employed was the girandole mirror, which is a convex mirror (I assume spherical) in front of which were mounted candles. The idea is that the curved ...
1
vote
1answer
43 views

How do you tell if a wave is reflected or refracted at an interface?

My physics textbook says that a wave traveling through medium $1$ will enter medium $2$ if medium $1$ has a higher index of refraction. Otherwise, the wave will be reflected. This makes absolutely no ...
0
votes
0answers
41 views

The path that light takes [duplicate]

How can I explain how the probabilistic rules for light propagation are consistent with law of reflection from ray optics?
2
votes
2answers
81 views

Why do photons keep their polarization when they reflect?

I understand that photons do not change their polarization when they pass through glass because they are not absorbed in the glass due to the band gap. I also now understand that reflection does not ...
0
votes
0answers
13 views

Intuitive explanation for the Fresnel effect?

I've spent some time researching the Fresnel effect as part of learning how to make shaders and, although I got how it works and how to calculate it, I haven't been able to figure out why it works. ...
0
votes
1answer
42 views

What is the speed at which the driver appears to approach the truck?

The rear view mirror of a car is a plane mirror.A driver is reversing his car at a speed of 2m/s.The driver sees in his rear view mirror the image of the truck parked behind the car.The speed at which ...
2
votes
2answers
78 views

Can we see a real image with naked eyes? [duplicate]

If we can't see a real inverted image without the help of a screen, why are we able to see an inverted image on the concave side of a spoon and in the convex lens when the object is far from the focal ...
1
vote
1answer
37 views

How do we see reflections in water when looking nearly straight down at the surface?

According to Snell's law and Fresnel's equations, using IOR of 1.33 for water, my calculation of Fresnel's suggest the reflectivity of water at an angle of incidence of 0 is approx 0.02 (i.e. 2%). ...
0
votes
0answers
20 views

Does a negative image distance in descartes equation mean the image is inverted

I understand that a concave mirror can be used in order to get a large, upright image. For one question, I need to explain where the object needs to be placed in order to get the largest possible ...
2
votes
1answer
85 views

How many images are formed when an object is placed between two plane mirrors with angle $72^\circ$?

I'm a little confused here since there are varying answers on the internet, and I cannot find any legitimate sources explaining this problem. According to what I've seen, the formula is simply $$ N = ...
0
votes
1answer
13 views

Behavior of collimated beam inside tubular first-surface-mirror

Picture a cylindrical tube, the interior surface of which is a 1st-surface mirror coating. Visualize the diameter of this tube as circumscribing an equilateral triangle with sides A,B,C. The plane ...
1
vote
1answer
46 views

How is reflection explained in quantum optics? [duplicate]

In classical electromagnetism, reflection is explained using the Maxwell equations and boundary conditions. How is reflection explained in quantum optics? What happens to photons during reflection? ...
1
vote
2answers
21 views

The interaction of pulse between two ropes of different thickness

What occurs when you send a pulse from a; Thicker string to a thinner string Thinner string to a thicker string And why does such a result occur? I have learnt that the frequency does not change ...
0
votes
0answers
4 views

Is there any way to measure or calculate the diffuse reflection of a polymeric fibre?

I want to estimate the diffuse reflection of a polymer fibre. Is there any equation, for example, can be used to determine this value?