Reflection Definition and 966 Threads

Hi, I just bought an iPad mirror screen protector and I'm really puzzled about how it works. You can see a video of the protector here The mirror quality is very good, of the order of 95% reflectivity, and it's not a metalized film as transmission is ~95% You can see in the video that...

Hello everyone, I'm hoping someone will be able to shed some light on what I have to ask. Basically, I'm interested in the reflection of Rayleigh Waves/ Surface Waves as it travels and passes from a free surface to a surface in contact with a liquid. In particular, is there any written text or...

Homework Statement "Calculate the reflection loss when a beam of radiant energy passes through an empty quartz cell assuming the refractive index of quartz is 1.55"Homework Equations I/I_i = ((n2-n1) / (n2+n1))^2The Attempt at a SolutionI'm taking the refractive index through the empty cell...

Just read Feynmen's QFT and been wondering the difference between photon reflection by a perfect mirror and photon scatter by say a rough surface. In both cases, photons are said to be absorbed by electrons and re-emitted. But in reflection case, photons get to "preserve" its wave...

Hello Forum, to obtain good anti-reflection at one specific wavelength, a layer of the right index of refraction is deposited on a certain surface. The layer thickness must be d=lambda/4... This achieves better transmission. If we used multiple layers we would get even better transmission...

Homework Statement I have a university project that involves comparing various paints with regards to how they affect the insulating properties of houses. As part of that I would like to measure the emissivity of the paint for a variety of wavelengths. Unfortunately I can not simply heat...

Can some one Fully explain reflection for me, because i am reading my book and i read about wavelets and I DONT UNDERSTAND THAT, so can some one explain it all PLEASE

when light encounters a mirror, is it instantly reflected, or is it absorbed very briefly and then emitted?

A radar of 10 GHz produces an electromagnetic plane wave. Conductance is 4 S/m and dielectric constant is 81. How do you ding the magnitude and reflection coefficient? Also the percent of the incident energy that is reflected?

An object is placed 11 cm from a certain mirror. The image is half the height of the object, inverted, and real. 1/p+1/i=1/f ? Clueless because I don't know how to set up the equation int his kind of situation.

Is there a fundamental difference between specular and diffuse reflection, or between diffuse reflection and scattering? I have heard various explanations that I am trying to sort out. (Please note that these "explanations" are not necessarily an accurate record of what was presented to me--...

When a source emitting a sound of a specific frequency moves towards the face of a cliff at a speed. The frequency of the sound that reaches the cliff is for sure not the same as the frequency emitted from the source due to doppler effect. Will the frequency of the sound reflected by the cliff...

Homework Statement Hi I think I have confused myself: If I have a linearly polarized beam incident on a plane mirror with higher index, will the 180-degree phase shift change the direction of the polarization? Say, from lying in the 1st-3rd quadrant to lying in the 2nd-4th quadrant...

Homework Statement Given the sphere (x-2)^2+(y-1)^2+(z-1)^2=4 and the plane x+2*y+2*z=15, find the equation of that sphere which is the mirror image of the given sphere relative to the given plane. The Attempt at a Solution I was thinking the following constraint #1: eq. of...

I've been asking myself this question that is not entirely clear to me: the Bragg condition used to describe the constructive interference of waves on a crystal is based on the assumption of reflection. However, x-rays diffract on a crystal rather than reflect, so theoretically there is always...

Consider i m moving at a velocity considerable to the speed of light. Above me there is a mirror stretching to infinity . It doesn't move with me. Now if i shine light on the mirror where will the reflected beam hit me?right on me, back of me or infront of me?

I have the following "Parabolic Dish" z=c(x^2+y^2) I have to prove that all the reflecting light rays that hit that dish go through the same point Q in the Z axis, and then I have to find said point Q. I've thought of reducing the problem to 2 dimensions. Started with the parabola y =...

Hello everyone, I am new to this forum, and to physics really, so i apologize in advance for silly mistakes. Bascially, I am a keen A-level student, and i spend much of my spare time reading and trying to learn physics, far above me, it would be fair to say, I've jumped in at the deep end...

Homework Statement http://i.imgur.com/JElvT.png Homework Equations The Attempt at a Solution When will I get total reflection? sin(theta)>1?

Looking around at all the cheap surplus beam splitter cubes out there. I've found no description of how things would be expected to behave outside of the spectral bands for which they're designed. Leaving out the transmissivity of the glass itself, should I assume that when relative...

Find the reflection v' of v=i-3j+2k around the line i-k how can I do that? I am extremely rusty with math these days;

Homework Statement I was asked to determin the film thickness for an oil film (n=1.33) for a light beam (500 nm) to give total reflection. I could calculate refraction angle for air to oil, but have no idea as to how to approach this question. Homework Equations The Attempt at a...

Homework Statement I'm working through a step potential and I am confused as to why one of the coefficients doesn't go to zero. V(x) = 0 when x < 0; V(x) = V_not when x > 0; a. Calculate reflection coefficient when E < V_not I can solve the reflection part, it is a step towards it...

Homework Statement As shown in the attachment, a radio signal travels down a tunnel, reflected by the walls and floor. Assuming that at most 2 hops contribute, calculate the voltage Vab at A due to current Ib in antenna B. Obtain a formula that depends on various parameters of the...

I'm not asking for what reflection and refraction are or the usual law governing it, but I would like to understand what they represent at the quantum atomic, molecular level? In a mirror is it about photons absorbed and emitted with the same wavelength and same direction through atomic electron...

I have been having trouble with this for a long time 1st - How and Why is a image formed ? 2nd - If all objects reflect light why is the image not seen on all the objects Even walls reflect light but there is no image formation when light rays from an object reflect off an object and...

Homework Statement X-rays of wavelength 0.09 nm are incident on a crystal. A reflected beam is observed at 36 degrees from the incident beam. What is the spacing of the planes in the crystal? Homework Equations Bragg's law: 2 d \ sin \theta = m \lambda The Attempt at a Solution...

A tank whose bottom is a mirror is filled with water to a depth of 61.0 cm. A small fish floats motionless 21.0 cm under the surface of the water. (a) What is the apparent depth of the fish when viewed at normal incidence? (b) What is the apparent depth of the image of the fish when...

A definition for the normal in reflection and refraction?

For a 3x3 orthogonal matrix with determinant= -1 (which means rotation followed by simple reflection), is the axis of rotation the same as the plane of reflection ? My reasoning is follows (see attachment) Say you have two vectors with the same angle size (which i call A), same x-values...

Hi, When there is reflection, we generally use the phase shift upon reflection to be \pi. Where does this \pi come from or is it arbitrary? I ask because I came across an optics book which describes beam splitters (a mirror is of course a beam splitter with reflectivity, R=1 and...

What are the definitions of source difference, path difference and reflection difference. Thanks!

Homework Statement A lamp is placed in the center at the bottom of a 2m deep swimming pool. The lamp emits light in all directions. Starting from a point directly above the lamp, a man in a canoe paddles until he no longer can see the lamp. How far did he paddle the canoe? Assume that the...

Let's say there is a conducting plane of conductivity \sigma. Boundary conditions for above and below such plane are: E_1^t = E_2^t (D_2 - D_1 ) \cdot n = \rho i.e. tangential components of E field are continuous and perpendicular components of D are discontinuous because of surface charge...

diamonds shine brightly because light inside them is reflected repeatedly within its walls.why this repeated reflection increase the brightness of light??

Hi, I've this board, like shown in attachment, that has 2 rows. Each rows have 4 places. I'm trying to find a general function that gives me the reflection of the numbers. I've 2 questions, so I put each question in a item. a) Like shown in case a) of the attachment, If I write the...

Hi, A wave is changing from medium A to medium B and it travels slower in medium B than in medium A. If I draw a normal line from the boundary to the wavefront the wavefront in medium B will move away from the normal? I attached to make it more clear Furthermore, I got this question...

How is a wave reflected in a open pipe?

Hello everybody, I've often read that if a light ray travels from a medium 1 to a medium 2 and the two media have the same impedance, there is no reflected light at all, only transmitted light. So i made some calculations assuming to have two media with two different refractive indexes but same...

Just as the title says, suppose X is a symmetric manifold and \hat{S}(x) is the linear operator associated to \sigma_x\in G for some unitary irreducible representation, where \sigma_x is the group element that performs reflections around x (remember X=G/H for H\subset G). Now take the...

Reflection in a spherical mirror behaves like inversion in the sphere, which is the 3D equivalent to inversion in a circle. 2D Reflections in circles [i think, just play along] can be generalized to arbitrary 2D curves by finding the normal line(s) through the curve passing through the point we...

How Does Reflection Behave In Arbitrary Surfaces Hi I am interested to know how reflection would behave in a mirror on a surface of negative [gaussian] curvature. I tried googleing it and found nothing useful Thanks Edit: Reflection in a sphere behaves like inversion in a sphere...

Hello.. I just registered to ask this question which we were discussing with my friends for a while.. Why do you think the moonlight reflection on the sea is wider on the horizon once the moon is on the top, and the reflection goes narrower when the moon moves towards the horizon..? We...

I've been curious about this question and hope that someone can provide a definitive answer with support for that answer. Is it possible to directly see your own reflection in water? From my understanding of reflections and my own observations I would say that it's not possible to...

The waves book by A.P.French gives two characterizations of the reflection coefficient for a 1-D traveling wave encountering an interface between two media. On one hand, he writes R = \frac{v_2 - v_1}{v_2 + v_1} where v_i are the wave speeds in the two media. Later on, he writes the reflection...

If there is total internal reflection, does the angle of incidence always equal the angle of reflection? Thanks

Does total internal reflection occur if the refraction of light is passing from air into water? Thanks

How do I determine what percentage of a signal is reflected and what percentage goes through a wall. I know that I am over simplifying things, but for the purpose of my project I need a simple answer to this problem. What parameters are needed for the solution and how do we calculate this...

Which of the following is consistent with experiment/observation. When light is reflected off of a material, what happens to the photon? A. Is it absorbed by the electron or lattice and then re-emitted? OR B. Does it somehow just reflect/bounce off the electron/lattice? Kind of...

Homework Statement (Irodov - Problems in General Physics - 1-31) A ball starts falling with zero initial velocity on a smooth inclined plane forming an angle α with the horizontal. Having fallen the distance h, the ball rebounds elastically off the inclined plane. At what distance from the...