Reflection Definition and 966 Threads

If a photon is not absorbed by an atom during collision, what determines the direction of the reflected photon? Explicitly... Does the photon reflect off of the valence probability 'shell' by abiding angle of incidence = angle of reflection? This seems counter-intuitive to me because some...

Hi all, I know this is probably a very logical question but just to confirm. Can wave reflection interfere with communication in any wave.

Hi, I was about solving a refrection problem and I'm just one step away from the solution. I stuck at some simple problem I guess. I have: \alpha=60°+\frac1 3 arcsin(\frac1 {1,33} sin(\alpha)) and I want to find the alpha but I have troubles to solve this. I guess it's not that...

A slotted line used on a 150ohm lossless transmission line connected to an unknown load impedance, ZL. The voltage standing wave ration is found to be equal to 3. The distance of the first voltage maximum from the load is found to be 9 cm, and the first voltage minimum is located at 3 cm from...

Homework Statement A wave with the amplitude 4 cm travels along a rope that is fixed to a wall. The wave reflects from the wall. What is the amplitude of the reflected wave? Homework Equations I know it's something with light, could you explian in more detail? The Attempt at a Solution

I'm going to be very careful to avoid the word "greenhouse" because of the indefinite ban on discussions about climate change - I want to be clear, this isn't a topic about that. Part 1 - some gasses in the atmosphere absorb and emit radiation in the thermal infrared range. Gases like water...

reflection in a hollow metal waveguide... Hello Forum, when an electromagnetic wave hits a conducting surface there are surface currents generated on the surface itself. These currents are the result of the interaction between the field and the metal. Do these currents radiate their own...

Homework Statement http://imgur.com/93CdT Is the photo upside down? Homework Equations I do not understand the following: - Why can the image of the sun in reflection not be higher above the horizon than as it is viewed directly? - "What about the people in the photo? Try to draw a diagram...

In Griffiths Electrodynamics (page 397) electromagnetic wave reflection at a conducting surface is introduced. He says "for ohmic conductors, Jfree = sigma * E, there can be no free surface current since this would require an infinite electric field at the boundary." I don't understand why...

So here's my problem... I have a particle traveling at velocity T, Vt, with components Velocity x, Velocity y, and Velocity z (3 dimensions). This particle collides with a triangular surface. Each point of the triangle is known (x y and z for each point) I would like to find the components...

A few days ago I started reading through Feynman's QED. It is a very good book, I am very much enjoying it. There's something I don't understand. When Feynman starts to talk about why light is reflected such that the angle of incidence equals the angle of reflection, he gives an example where...

Homework Statement If a light beam is circularly polarized and then bounced off a mirror perpendicular to the optical axis, what is the new polarization. My thought is, because circularly polarized light has basically 2 components behaving like waves, each of them is going to experience a...

Homework Statement An electron with kinetic energy 5 eV (8.01E-19 J) passes through a 3 eV (4.806E-19 J) potential barrier. There are certain widths for this potential barrier in which the transmission probability will equal one hundred percent and the reflection probability will equal zero...

I am writing code for a particle simulation and I have this question: Homework Statement A particle, with initial coordinates (xi,yi,zi) w.r.t a fixed origin in a global rectangular coordinate system, is traveling toward one of the faces of a cube with a speed whose direction can be described...

Homework Statement A light ray in air is incident on a glass plate whose index of refraction is 1.42. The angle of refraction (transmitted angle) is one-half the angle of reflection. (Take the index of refraction in air to = 1.00). A) Relative to the normal to the plate’s surface, what...

Homework Statement An EM wave travels in vacuum and incidents on a dialectric material in the XZ plane. The wave's polarization is in the \hat{y} direction. Prove that the polarization of both reflected and refracted waves are too along the \hat{y} axis. Homework Equations The...

The Amasci site makes this statement: "charge is the stuff that reflects light and makes objects visible..." Can anyone elaborate on what this means? I cannot think of a way to explain it at all - I don't even understand how charges could reflect light. Thanks!

When is the law "the image is formed back in the mirror at a distance equal to that of the object from the mirror applicable? Consider a plane mirror,with a glass slab on it. Let an object be placed in front of it outside the slab, in air. Now due to normal shift the mirror will see the...

Homework Statement See figure attached. Homework Equations The Attempt at a Solution Initially, \theta_{c} = 60^{o} n_{glass}sin\theta_{c} = n_{air} So, n_{glass} = \frac{n_{air}}{sin\theta_{c}} Now I would think that the incident angle from glass to air would be...

How can I understand "reflection coefficient" for a certain circuit? Homework Statement I'm a beginner in RF circuit, though I've learned something about low frequency oscillator design, some new concepts still confuse me a lot, like the "reflection coefficient". I google it and found...

not relating to any specific homework question: how can i go about calculating the relative phase of reflected / transmitted fields for normally incident plane waves? for example, i know how to calculate the relative amplitude of the reflected field from the reflection coefficient...

I know that dielectrics polarize light reflected at/near the Brewster angle, but why is it that metals never do this, only dielectrics? Also, does anyone know of a good, simple conceptual explanation for why light becomes polarized when it's reflected from dielectrics?

1.A linearly polarized plane wave, traveling in vacuum in the x-direction, is incident on a half-infinite magnetic region. The magnetic material is magnetized in the +y-direction with the saturation magnetization Ms . The dc magnetic field inside this material (internal dc field) is constant...

Please look at the two sources that describe wave reflection. Hyperphysics states that when a wave meets a rigid surface, it changes phase by 180 deg, such that an upright wave will reflect upright, as to produce a standing wave with the right conditions...

1. A 1 cm tall object sits 6cm to the left of a converging lens, f = 10 cm. A flat plane mirror sits 2 cm to the right of the lens. Light passes through the lens, reflects off the mirror, then back through the lens. Where is the final image? Real or Virtual? Upright or inverted? How big is it...

Homework Statement How far behind the mirror is the image of an object that is located in front of a flat (plane) mirror? Why do you think the image produced by a flat (plane) mirror is called a virtual image Homework Equations The Attempt at a Solution

Homework Statement You need to place a mirror on the left wall of the figure so that the reflected light from the bulb exactly fills the right wall. A) What is the proper height of the mirror? B) How far below the ceiling should the top edge of the mirror be? Homework Equations...

A fortune-teller’s crystal ball is a sphere of diameter 200 mm, made of glass with refractive index 1.70. A candle flame of height 10 mm is placed 1.00 metre away from the surface of the ball. Calculate the position and size of the two images of the flame: (i) reflected in the ball’s...

The incompleteness of Huygens principle has been discussed at length here and elsewhere, and has actually been completed, regarding wave propagation and refraction, relatively shortly afterwards (by Kirchhoff and Fresnel). This post is specifically about reflection, and should you be familiar...

This is for my 1st year undergrad course but it feels quite basic and not worthy of the 'Advanced Physics' section. Yet there's one thing I'm confused about - I have the answer, just something I don't understand. Homework Statement Light falls normally on a glass surface. What fraction of the...

Homework Statement A point object is placed at distance of 40 cm from a composite refracting slab whose one face is silvered as shown. The separation between the object and its final image is (100 – k)cm. Find the value of k. The Attempt at a Solution I got the separation as...

1. Homework Statement A di-electric slab of thickness d is between two differing dielectric media (u0,e0/u1,e1/u2,e2). What is the total reflection at the first interface and transmission through the second interface of the slab. The incident wave is in the x-z plane with an angle of...

Homework Statement See figure attached for problem statement. Homework Equations The Attempt at a Solution Using Snell's Law, n_{1}sin(\theta_{1}) = n_{2}sin(\theta_{2}) n_{1} = \frac{n_{2}sin(\theta_{2})}{sin(\theta_{1})} Where, \theta_{1} = 30^{o}, \theta_{2} =...

Homework Statement A car is driving west and a patrol officer is driving east at 23.50 m/s. The officer's radar gun indicates that the car is speeding. If the radar gun sends out a frequency of 24.15GHz and receives a reflected signal of 24.20GHz, what is the velocity of the car? (Assume radar...

Homework Statement A client has asked you to produce a sheet of material that will appear yellow for transmitted light and purple for reflected light. You decide that "yellow light" is 600 nm and that "purple light" is 400 nm. If you use MgF2 (n2= 1.39), how think should the sheet be...

How is that in refraction of light energy is lost but not in case of total internal reflection? Is the loss in total internal reflection exactly zero?

when light is reflected on a surface, there is always going to be some absorbsion by the reflective material. what I'm curious to find out is whether the losses in refraction are compareable? is it just dependant on the transparency of the material?

Homework Statement You're helping with an experiment in which a vertical cylinder will rotate about its axis by a very small angle. You need to devise a way to measure this angle. You decide to use what is called an optical lever. You begin by mounting a small mirror on top of the cylinder. A...

Find a basis Beta in R^2 such that the beta matrix B of the given linear transformation T is diagonal. The Reflection T about the line R^2 spanned by [1 2], [1 2] is suppose to be verticle. B=S^-1AS or B=[[T(v1)]beta [T(v20]beta] so i found the reflection matrix to be...

Homework Statement 1. When a wave is reflected from a mirror, there is no change in its a) Amplitude b) Frequency c) Velocity d) All Homework Equations The Attempt at a Solution I think frequency changes,not sure

hello ppl, i have a question about the reflection coefficient... since the RC indicates the permeabilty of a membrane for a specific molecule...doesnt that mean (If the RC between 0 and 1) that the concentration of that molecule on both sides of the membrane will become the same after a while...

when we have light reflecting off a material, what's going on there? is it something analogous to a gas particle rebounding off a container wall due to Coulomb repulsion? If so, what is it that exerts a force to reverse the photon's momentum perpendicular to the surface it's reflecting off...

Homework Statement Hi I wonder if anyone can help. I am having difficulty drawing refracted and total internally reflected rays. I have an exam on Monday. Can anybody recommend good websites that can help? Slight panic. Thanks Homework Equations The Attempt at a Solution

If light is from electric source, would persons on places A, B and C register any light in any spectrum.

Question about Total Internal Reflection? My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur. My...

Question about Total Internal Reflection? My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur. My...

Hello, I came across something interesting on the internet. I saw an image in which a wine glass was half filled with water and put in the middle of the two different colored backgrounds. In the air portion within the glass, the two backgrounds were visible through the glass, however; in the...

tif we presume that our finite universe has a boundry. This boundry is due to the pull of gravity. Light will slow down and then come back to us. 'i may be absolutely wrong in this'. My question is that the light we see will be from the stars surface that doesn't face us and star moving away...

Homework Statement In the given arrangement pulley P1 and P2 are moving with constant speed vo downward and the centre of the pulley P lies on the principal axis of a convex mirror having radius of curvature R. Find the speed of image of pulley P when it is at a distance x from the surface...

A pulse reaches the boundary of a medium in which the speed of the pulse becomes higher. Is the reflection of the pulse the same as for the incident pulse or is it inverted? Also, does pulse refer only to mechanical waves and not to electromagnetic waves?