Reflection Definition and 966 Threads

Homework Statement Okay, I've got a question that's been bugging me for the longest time. I've got a string attached to a wall at one end (the other end is free to move, though) and it has a sinusoidal wave traveling to the right and hits the wall at x = L and reflects. I'm supposed to...

Homework Statement A thin 1.00x10^-5 cm-thick film of MgF2 (n=1.38) is used to coat a camera lens. Are there any wavelengths in visible spectrum intensified in reflected light? Homework Equations thickness = wavelength/4n (n is refraction index) ? The Attempt at a Solution I am...

We have 1 particle. Classical Mechanics says: If I know the initial state I can predict with absolute certainty what position (etc.) it will have the next second. Quantum Mechanics says: I don't know the position the particle will hit. But If I know the state I can tell you the possible future...

Homework Statement The point Q is the reflection of P(-1,3,4), in the plane with equation 2x-y+z=1. Determine the coordinates of Q Homework Equations The Attempt at a Solution Well I am not really looking for a solution. I just want to know what I am trying to find. What is a reflection in...

From what I have been reading, the reflection of light from an object, like th eyellow color of sulfur is the same phenomenon as Rayleigh scattering. It seems that the electrons receive the incoming photon and are raised to a higher "virtual energy state." When they return to the ground state...

How do the angle of incidence relate mathematically with the angle of reflection after the critical angle, that is, in a TIR? Say we have a person standing at the bottom of a swimming pool, if we take the n for water as 1.33 and for air as 1, we get the critical angle of 48.75 degrees. When the...

hi, i got a real problem. i have a question here and have absolut no clue what i have to do and which equation i have to use... ( for my shame, i was sick at that time we done it in school..) question: A diver is at the bottom of a lake, which is 10m deep. if he looks straight up he...

Homework Statement I have a transparent plate (call the thickness t and refractive index n), it has a scratch at a point A. A microscope objective (M, positive) images the point A in A' at a distance D from the objective. If we move M a certain distance d down (without changing focus, meaning...

Homework Statement Consider an infinitely long continuous string with tension \tau. A mass M is attached to the string at x=0. If a wave train with velocity \frac{\omega}{k} is incident from the left, show that reflection and transmission occur at x=0 and that the coefficients R and T are...

Two submarines are underwater and approaching each other head-on. Sub A has a speed of 12 m/s and sub B has a speed of 17 m/s. Sub A sends out a 1520 Hz sonar wave that travels at a speed of 1522 m/s. ... I already solved for this question ... ... What is the frequency of the sound detected by...

qw: A photon is incident on a beam-splitter. At high light intensities, the beam-splitter is known to transmit 30% of the incident light, and reflects 70% of the incident light. Calculate the probability that the photon is refected, and the probability that the photon is transmitted. how do i...

Consider the step potential defined by V(x) = 0 if x < 0 Vb > 0 if x=> 0 a) Compute te relfection and tranmission coefficients for a particle of energy E > Vb approaching from th left For x < 0 Schrodinger equaion since V = 0 -\frac{\hbar^2}{2m} \frac{\partial^2 \psi}{\partial x^2}...

In Figure 33-48a, a light ray in a liquid (n = 1.61) is incident at angle 1 on a boundary with an underlying material, into which some of the light refracts. There are two choices of underlying material. For each, the angle of refraction 2 versus the incident angle 1 is given in Figure 33-48b...

Hi I have a question about pulses in a wire. If I have a single wire of length X and I send a pulse through the wire, when the pulse gets to the end of the wire, does it reflect back with the opposite phase or in phase when the original pulse? I'm trying to visually compare the behavior with...

Hello, I am working on a problem, how would the echoes from a large and small insect compare if they were the same distance from a bat? (from the bats point of view of course) I don't think they would differ at all. If the insects are not moving, then there would be no differance. The only...

I'm studying for a test that is going to cover mirrors and lenses. I was under the impression that the focal length for any concave or convex mirror was half the radius of curvature: f=r/2 but one of the questions in my book involving a convex mirror uses a different value for f, according...

I'm hopelessly stuck on this question. Any help will be greatly appreciated. Prove that if we have a parabolic mirror with focus at F and axis of symmetry the x-axis, then a light ray emmited from F will be reflected parallel to the x-axis. To prove this consider the parabola y^2=4px (where...

Hello! I'm working on a surface analysis of a silicon-microstrip-detector. That is basically a silicon wafer with p- and n- doped strips on it. They are periodically produced on the crystal. Therefore I can use it as a diffraction grating for visible light to do my surface analysis. My light...

Here's the problem: Here's what I understand: I know what a biconcave lens looks like, and how it behaves (for the most part). Of course I know that the index of refraction is ~1.00. And since the radii are equal that makes the equation somewhat easier. The thick lens equation is...

Hello all, I was wondering about the physical meaning of reflection for quite a while. Suppose say I have a transmission line and say it has reflection at discontinuity what does this mean in physical sense. It would be really helpful if I get answers for this. I have couple of other...

I've been playing around with parabolic mirror calculations in my free time, and right now I'm trying to derive the equation for the line that models the angle of reflection off of a point. I understand how to find the angle of incidence and that the reflection will have the same angle off the...

Hi this is my first post here. So be nice now o:) I´ve have a problem with a question: T:\mathbb{R}^2\rightarrow\mathbb{R}^2 first reflects points through the vertical x2-axis and then rotates points \pi/2 radians./Perrry

Consider a particle moving in 1 dimension and encounters a potential step. Suppose that the total energy of the particle is higher than the potential barrier height, E > V. Wouldn't a classical mechanical particle, traveling at velocity v, break through the barrier? And wouldn't a quantum...

I'm speculating about the nature of time, or at least a perception of it, and I'm thinking of an analogy to represent some of these speculations. I thought about how images are reflected to infinity when placed between two mirrors, but I would like to specifically know what the reflection of...

The distance between the primary planes of a NaCl crystal is 2.82 Å. It was found that the first order Bragg reflection of a monochromatic x-ray beam occurs at sinus= 10 degree. (i) Determine the wavelength of the x-ray. (ii) Determine the angle, sinus for a second order reflection.

I have been trying to solve this problem using many equations, but am not getting the right answer. I guess I'm not using the right formula because I don't know it. Can someone please help. The rear window in a car is approximately a rectangle, 1.17 m wide and 0.160 m high. The inside...

Sir, When a wave is reflected from a free end or a rigid end, will there be a change in amplitude always?

Was recently re-reading QED and wondered whether there was any "simple" explination of partial reflection? How does the thickness of glass affect reflection if it's a particle?

What is the factor that determines whether an object will be transparent, translucent, or opaque? Also, what makes reflecting surfaces reflect EM rays?

Say that light is incident on a plane mirror, normal to the surface (i.e. zero degrees from the normal). Why does the reflected light (which heads back toward the source) not interfere with the incident light?

So, I just found out that a nickname I used to refer to my little sister by (and still occasionally do) is an ethnic slur for Hispanic people. I won't say what it is, except that it has to do with beans. In case you're wondering, the name was a corruption of the name of one of the characters...

A thin film of ethyl alcohol (n=1.36) is spread on a flat glass plate and illuminated with white light. When illuminated and viewed from directly above, it shows a coloured pattern in reflection. If the only visible light reflected by a certain region of the film is yellow (lambda=560nm), how...

How do an atom "know" when to absorb a photon, and when not to? It seems like an atom absorbs all photons that either has energy that corresponds to the difference between two energylevels, or has any type of energy at all in which case the photon energy helps speed up the atoms oscillations...

I know this has been discussed to death and I acknowledge the fact that there truly is no conclusive answer. However, I have to do my best to outline that light is indeed a particle through its properties of reflection. So far, I've simply come up with the fact that laws of reflection follows...

Hi, why the reflection in ionosphere isn't direct?,

A tiny layer of oil (n = 1.25) is situated on top of a water puddle (n = 1.33) in a parking lot. If the thickness of the oil is 242 nm, the what color(s) of visible light will give a strong reflection? 2t=m*lambda/n2 2t=242nm/1.25 and then 2t=242nm/1.33 i just don't know what goes where...

Let's say I have light at normal incidence. Under what circumstances is there a phase shift? Under what circumstances is there no phase shift? My best guess is that there is normally a phase shift of 180 degrees. The exception is when n_incident > n_reflected, but I don't really know. To...

hey so I'm doing this question on total internal reflection and have got myself totally lost here is the question: what is the smallest angle \theta(1) for which a laser beam will undergo TIR on the hypotenus of this glass prism? after reflecting off the hypotenuse at \theta(c) the...

i have a problem with understanding the phenomenon of reflection and refraction of light. when considering light as a electromagnetic wave i cannot imagine how it can be reflected or refracted when meeting a surface of different refractive index. it just sounds illogical to me that sth...

We know that when there is a change in medium there is reflection of sound.when it passsess through a pipe open at both end's , sound reflects.Actually the medium is same inside the pipe and outside the pipe, then how can we explain the reflection of sound from other end of pipe?

What are the ways that things can be reflected through flat, converging, and diverging mirrors? I know that for flat mirrors it's a virtual image equal to the size of the object For the converging mirror, if the object is placed farther than the radius of the mirror, the image is real and...

Does anyone have a link to a chart or table that shows the % of light reflection from some solid as the wavelength is changed from RadioWave to X-ray?

Hello, I was wondering how to find the minimum height of a mirror so somebody of height H that is at a distance D of the mirror sees himself from head to toes. Anybody can help me out ? Thanks !

That's IT. And by that I means THIS.

I have been reading Feynmanns 'QED' and am trying to understand what happens when light is reflected from a surface. I would be grateful if someone could answer the following question. I am not sure which of these views (if any) is correct. 1) When light is reflected from a surface a photon...

Hi let's suppore that an antenna creates two signals... The two signal are received from an other antenna but with a main difference. The one of the two signal is reflected in a surface which means that it will travel bigger distance... The two signals are received with a difference in the...

hi all one basic question in physics aroused owing to my poor memory. i vaguely remember that there is a difference in the colour of the object we see in reality and that generated by a television or for that matter any artificial source of light. 1) Now how does our eye perceive these (...

I have two mirrors at the same height on opposite walls facing each other in my bathroom. I took a laser pointer and put it in between the mirrors and directed the beam at one, such to where the reflected beam hit the other mirror, and back on the first and so on. Anyway, I noticed probably 16...

If i throw a tennis ball against a wall in a 45 degree angle, it reflects with a 45 degree angle. A beam of light against a mirror also reflects in a 45 degree angle. If i throw a tennis ball against some irregular surface in a 45 degree angle then the ball, depending on the shape of the...

One of my problems reads, 1. Determine the maximum angle for which the light rays incident on the end of the pipe in Figure P35.38 are subject to total internal reflection along the walls of the pipe. Assume that the pipe has an index of refraction of 1.40 and the outside medium is air...