Reflection Definition and 966 Threads

Homework Statement A light ray strikes the surface between two transparent materials as shown. Each angle is labeled with a letter. Give the letters for the angle of incidence, angle of refraction and angle of reflection, in that order Homework Equations...

Homework Statement A beam of light in air strikes a piece of glass (n=1.51) and is partially reflected and partially refracted. Find the angle of incidence if the angle of reflection is twice the angle of refraction. Homework Equations n1sintheta1 = n2sintheta2 The Attempt at a...

Homework Statement A bus is moving at 37.00m/s towards a wall. The sound from the bus has an original wavelength of 0.1500m. The sound from the bus reflects off the wall. What frequency sound does an observer on the moving bus hear from the reflection?? Homework Equations Moving Observer: fo...

I am not a physicist but I do have a non-mathematical science background and I am a serious physics appreciator. I am new to this site and have a pressing question I would like to ask a physicist. High school and even college level physics texts desribe the reflection and refraction of light...

Homework Statement An underwater observer is looking directly into the sun. His head is near, but below the surface, and he is not wearingsun glasses. Let Ls(x) be the solar radiance at the water surface, on the air side, when the sun is at a zenith angle x. What is the ratio of the solar...

Homework Statement A ray of light enters a light fibre so that it hits the side at an angle of 16° with the long axis of the fiber, . Calculate the distance the light ray travels between successive reflections off the side of the fibre. Assume that the fibre is 1.03x10-4 m in diameter...

Homework Statement Consider the step function potential: V(x) = \{ \begin{array}{*{20}c} {0,(x \le 0)} \\ {V_0 ,(x > 0)} \\ \end{array},Caculate the reflection coefficient,for the case E<V0,and comment on the answer Homework Equations - \frac{{\hbar ^2 }}{{2m}}\frac{{d^2 \psi...

Hello all I work at a BC Ski-hill... what I need is a method to quickly but accurately measure the depth of dense snow (man-made snow, some might call it ice). Traditional method of mechainically boring through to ground is slow, inaccurate & messy. New GPS based methods require detailed gps...

Homework Statement A plane mirror is moving at a uniform speed v away from the observer and a pulsing source of light of frequency f_0. What is the frequency of the light reflected in the mirror as seen by the observer? This isn't an actual homework question but I have a similar...

Homework Statement 1. If you looked at the spectrum of a reflection nebula, would you see absorption lines, emission lines, or no lines? Explain your answer. As part of your explanation, describe how the spectrum demonstrates that the light was reflected from nearby stars. Homework...

I've noticed the the reflection of a 2-d shape about some line is the same as rotating it by 180 degrees about that line, where it rotates through the third dimension. Does this generalise to higher dimensions? I hope it's clear what I mean here.

Homework Statement Is it possible to move an object and a lens in such a way that the image is virtual? The Attempt at a Solution Well I could use a convex lens, and shine a light into it, then something would happen. The light would be angled up or angled down (depending on the...

Does anyone Know a program that can simulate light reflection in a 3d environment, to help me in my project "Solar Heliostat". I want the program to determine the angle of reflection and the size of the beam of light on the desired target.

I'm surprised to have reached this far in a forum. My earlier record was 200 in a Diablo 3 gaming forum, and I have a strong passion for that game. I guess knowledge is a virtue that I just can't let go, so this is why I'm still here today after about one and a half years. I have really...

Homework Statement find the matrices representing linear map T:R3 -> R3 with respect to the standard basis Homework Equations T reflects each point in the (x,z)-plane The Attempt at a Solution I can't figure out how does x,z plane looks like...

why reflection coefficient R=1 in step potential though there happens transmission also as a negative exponential when E<V0

A small source of light at the bottom face of a rectangular glass slab 2.25 cm thick is viewed from above. Rays of light totally internally reflected at the top of the surface outline a circle of 7.6cm in diameter in the bottom surface. Determine the refraction index of the glass. This is...

You know when people say they have a craft out in space and use the sun light to move it by bouncing it off mirrors . so I take it you would never be able to get the craft back to where you launched it using light from the sun. Or would this work to get it back rotate the mirrors with an...

Hi guys, i need some help on this topic. Basically, i need to calculate the angle of reflection of a oblique shock on a solid boundary. Here is the description of the question i have: an incident supersonic flow reaches a compression corner, with a deflection angle of 15 degrees...

Could someone explain to me what ionospheric heaters (like the one at EISCAT) do...in lay-mans terms? And what exactly is ionospheric reflection...again, in lay-mans terms. Thanks.

I was just reading my book when it said that the fact that Newtons rings were always dark in the center where the lens touches the glass plate is proof that reflections are 180 degrees out of phase with the incident light, but after further thinking, I think that logic doesn't make complete...

Homework Statement The drawing shows a crystalline quartz slab with a rectangular cross-section. A ray of light strikes the slab at an incident angle of 1=34o, enters the quartz and travels to point Po (Figure2). This slab is surrounded by a fluid with a refractive index n...

I'm wanting to get another optics book. I'm interested in finding a book that gives insight into how light waves interact with surfaces such as in reflection and x-ray diffraction and things like that using sufficient diagrams of the wavefronts and particles and rayleigh scattering. I want to...

Homework Statement Consider a common mirage formed by superheated air just above a roadway. A truck driver whose eyes are 2.00 m above the road, where n=1.0003 looks forward. She has the illusion of seeing a patch of water ahead on the road, where her line of sight makes an angle of 1.20...

I've two questions here:- 1) Sound reflects it is said using laws of reflection of light.So,it means we hear max. sound when angle of incidence is equal to angle of reflection,right?& if not equal then what do we hear or not? I guess we hear lesser than max.sound when the angles are not equal...

Think of this one (you can test it) - it's a foggy night and you are approaching a sreet light under which is a puddle of water. Beacuse of the fog you see a diffuse image when looking directly at the light, however, when looking at the reflection, yoe see a clear, sharp image. Why? Can anyone...

Homework Statement What is the thinnest film of a coating with n = 1.43 on glass (n=1.52) for which destructive interference of the red component (660 nm) of an incident white light beam in air can take place by reflection? Homework Equations 2t = m*lambda? The Attempt at a...

Homework Statement A glass lens is coated on one side with a thin film of magnesium floride (MgF2) to reduce reflection from the lens surface. The index of refraction of MgF2 is 1.38; that of the glass is 1.50. Assume that the light is perpendicular to the lens surface and that the thickness...

Hi everyone A few weeks ago, I had worked out the relations between the angle of reflection and angle of incidence in case of reflection from a plane mirror, (1) moving toward the incident ray (2) moving normal to the incident ray (PS -- This is not homework.) The way I did it was...

Hi, I'm working through an Excercise in Sean Carrol's spacetime and geometry book. The question asks you to consider an inertial frame S with coordinates x^\mu=(t,x,y,z) and a frame S' with primed coordinates. Which is related to S by a boost v in the y direction. Imagine a wall( or mirror)...

Hello forum , i have a spindle motor from an HDD and i pasted to this motor 6 facets polygonal mirror, the problem is that the mirrors are not 100% alignment ( it's hand made) and the laser reflected from this mirrors is doing 6 lines ( where it should be one line if all mirrors are good...

Optics -- How long can I see an objects reflection Homework Statement The object is traveling at a constant velocity of 4 m/s. Initially, the observer can not see the object. At a certain point, the observer can see the reflection of the object in the mirror. For how many seconds is the...

Homework Statement Three objects P, Q, and R, are viewed through a plane mirror AB. When an obstacle is moved towards the mirror, which object "disappears" (i) first; (ii) last? Diagram. I will describe it in words. The mirror is horizontally placed. Q is placed 10 cm directly above edge...

I feel a bit dumb, but could someone help me see this: G(s):= \int_{-\infty}^{\infty}f(-x)e^{-2\pi isx}dx = \int_{-\infty}^{\infty}f(u)e^{-2\pi i(-s)u}du = F(-s)

Homework Statement A particle of energy E approaches a step barrier of height U0. What should be the ratio E/U0 so that the reflection coefficient is 0.43? Homework Equations R=(k1-k2)^2/(k1+k2)^2 <--------reflection coefficient The Attempt at a Solution I am completely stumped...

“mirage” is refraction phenomenon or total internal reflection phenomenon? “mirage” is refraction phenomenon or total internal reflection phenomenon?

Hello, i have a very basic question about reflection of infrared light. What types of materials will give a diffuse reflection of light in the near IR spectrum (around 850nm)? Is the original wavelength affected by this reflection? thx in advance, michael .

If there is a "red" color ball people told me that if i shine white light on it the "red" color ball absorbs all the light and reflects "red" photons hence we perceive it as "red" colored Is this true? if this is right i want to know more details... what does reflect mean here? what does...

Hi, I'm currently looking into reflectivity and emissivity of metals in sunlight. However, I can't quite grasp how the mechanisms of reflection and emission differ. Emission obviously occurs because an electron is exited by a photon and then is de-excited and emits photon or photons. However...

Homework Statement A point source of light is at depth h below the surface of a large and deep lake. Show that the fraction, f, of the light energy that escapes directly form the water surface is independent of h and is given by f=0.5(1-\sqrt{1-1/n^2}) where n is the index of...

I have a question which may be based in a complete misunderstanding of how "color" and our perception of it works in terms of objects absorbing certain wavelengths of light and reflecting a certain length to show that color. My question is why does an object reflect a specific wavelength...

Hello fellow physicists :) I have recently done an experiment and am trying to propagate the uncertainty. Unfortuantely, I haven't done that in years, and need to remember how its done. For example: When theta= 20 (+-2) I want to find sin20 and the uncertainty: sin20=0.34 (+-?) How can I...

Homework Statement Let \sigma^+ light [left circular] be incident on a piece of glass, with incidence angle = 45^\circ. Characterize the polarization of the reflected light. The attempt at a solution My first thought is to simply treat the components of the electric field (Ex,Ey) as...

What is the difference between them. Even in total internal reflection not everything is reflected. I don't get it what is the big deal?

I took this photo in the Rijksmuseum Amsterdam. I hope it can be seen but the reflection of this silver thing is different colours in the different panes of glass. (Blue behind it, orange/red to the sides). What causes this effect? And why the particular colours...

Hi, I am trying to calculate the power of a reflected electromagnetic field and can't find a physical explanation for a given solution. I've noticed the following example: The Plane has a radar for altitude measurement which emmits the power Ptx at the frequency ftx. Calculate the power...

Homework Statement An electromagnetic wave is incident upon a planar interface at an oblique angle \theta_i, where it is reflected. For the wave vector components parallel to the interface, we have k_{xi}=k_{xr}. Thus, \theta_i=\theta_r. The wave numbers for the incident and reflected waves...

Hello every body; I am having a problem understanding how light is polarized by reflection, what happens during the process, and why is it polarized at a particular angle "Angle of Polarization". Can you please help me with this problem? I'll be thankful.

"Half-silvered mirrors" and transmission and reflection I am curious about any equations (whether empirical or no) that can predict the thickness of metal (on a glass substrate) needed for a given transmission/reflection ratio. Gold, aluminum or silver, it doesn't truly matter. This should...

two plane mirrors facing each other are 10m apart. A woman stands 3 m from one of the mirrors and looks at the mirror and sees two distinct images. How far are these images from the woman? this one is a bit confusing.. can somebody knows how to solve it?