Reflection Definition and 966 Threads

If you place an object a distance so from a spherical mirror, how do you calculate the image location given that the image is right side up and magnified by two times? I know the equation but I always get confused about what signs to use for lenses vs. mirrors, etc. I know the magnification...

Hi; I was wondering if someone could please help me with this question: "When you measure the law of reflection and the law of refraction, what is the advantage of making 2 measurements: one clockwise from the normal and one counterclockwise from the normal?" Could an advantage be that this is...

In owning more than a few Newtonian telescopes in my life, I have just a little knowledge concerning parabolic mirrors. But I could use the help of experts in the field... I was wondering if a larger parabolic mirror could reflect a perfect, aberration-free virtual image, of a nearby object. For...

Is it possible to melt a perfect mirror by radiative means? (reflects light of all frequencies with no absorption) Which leads me to ask. What is the mechanism (at the atomic level), for the reflection of light? I've never had a satisfactory answer on the mechanism of reflection. Is it...

A sound wave travels at a frequency 2.25 MHz through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is then mixed with the transmitted sound, and 87.0 beats per...

Why is it that a mirror reflection only exchange the notion of left-right but not up-down ? I mean if I were to stand in front of a mirror, my mirror image exchanges my left hand with the left, but not my head with my legs.

f(v) = (the matrix) |cosx sinx | |sinx -cosx |(v) If x is in R and f: R^2 --> R^2 show that f is a reflection in a line L through the origin, and find the line of reflection. im having trouble figureing this out, i know that i need to find a line L fixed by f, and then to...

What is your iq, 120, 130, 140, huh ,well that's nothing, i am so intelligent my mind fills all of spacetime, is it any wonder then that i seem a little dim locally with a mind spread so thin.

Hi, I went to my proff to ask for my master thesis, he told me that you yourself have to do the experimental set-up for EMISSION AND REFLECTION SPECTROSCOPY ,,,but I am not that experienxed, anybody knows is it an easy task or...?

Can someone explain the phenomenon of total internal reflection?

Does someone know a device that can reflect a laser beam in order to project an image? I remember years ago I saw a microchip that had an array of small mirrors, and was able to modify the angle of those mirrors... I think it was from Texas Instruments.

So what thing(s) would you be lost without, or couldn't give up?

Suppose a sound source S is moving towards a stationary wall and that a listener L1 is moving with the sound source. Describe in a few lines why the reflected sound heard by the listener L1 is Doppler-shifted by about twice the amount that a second listener L2 would hear standing by the wall...

With the passing of Pope John Paul ll, perhaps some reflection on religious beliefs is appropriate. Religion is defined as a set of beliefs concerned with explaining the origins and purposes of the universe, usually involving belief in a supernatural creator and offering guidance in ethics and...

Hello! I'm having difficulty solving this problem, I was wondering if you can help me solve it. Light is incident in air at an angle on the upper surface of a transparent plate, the surfaces of the plate being plane and parallel to each other. A ray of light is incident at an angle of 66.0...

Reflected light will experience a 180 degree phase change when it reflects from a medium of higher index of refraction and no phase change when it reflects from a medium of smaller index. This is very well known. However i am wondering why that is ? Can anyone give me some calculations that...

Radio waves of wavelength 250 meters from a star reach a radio telescope by two separate paths. One is a direct path to the receiver which is situated on the edge of a cliff by the ocean. The second is by reflection off the water. The first minimum of destructive interference occurs when the...

A corner reflector is to be made from a triangular prism with index of refraction n=2.56, as shown in the diagram on your assignment. What is the maximum angle (in °), with respect to the normal to the front surface of the prism, (theta), such that total reflection will occur? Ok this must be...

Why will total internal reflection occur when angle of incidence is greater than the critical angle? Anything deal with the particles?

I understand that a laser beam shining onto a diffraction grating produces a 0th order, 1st order etc... diffracted beam. My question is: What is the wavelength of the specular reflection [0th order beam] off the grating in regards to the wavelength of the incident beam?

Prove mathematically that when a plane mirror is rotated an angle theta about an axis through its center, the angle of deflection of a light is equal to 2theta. How am i to show draw this out? I have already drawn my points and lined up my angles with and without the mirror rotated. I don't know...

I am currently doing a PhD on the subject of solar sailing (if you don't know what that is and are curious enough, a quick google search on "Solar sailing" will give you a plethora of websites that will explain it for you). Solar sails depend crucially on forces generated when a photon is...

If monochromatic light of the same amplitude is shown on a closed hollow black box and a closed black box filled with iron, will there be a difference in the intensity of light that is reflected back due to differences in the absorption of light in the two boxes?

I am going to start out with a simple thought experiment: A particle is moving towards a wall at a 90 degree angle. The wall is perfectly smooth; therefore, when the particle bounces off, it will be traveling along the same path as it did when it came in. Does the ball ever come to a...

hello :rolleyes: i have these questions that i don't know how or what to do :rolleyes: :confused: Matt drops a water balloon from a balcony 15m up. As it falls, someone calls out 2.0 s after release to warn the bystanders below. If the air temperature is 20 C and the people can move...

Reflection in Mirrors! AAARRRGHHHH >> How many times will the incident beam be reflected by each of two parallel mirrors that are 1.60m high and 1.40m apart? The beam is aimed at the left mirror at 5 degrees from the horizontal. Okay I am completely lost here. I've read over all my...

I am struggling with the following problem. I believe it shouldn't be hard - i must be missing something :confused: ? A tuning fork generates sound waves with a frequency of 246 Hz. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The...

I have problem figuring out the reflection of a pulse on a rope with a fixed point. Do you know some websites to find animations about it?

This is a 'How did I do this?' teaser. A couple of notes first: - The picture I include is simulated (Googled for a generic shot). Sorry, best I could do without the original. Ignore the fact that a] it's not me, and b] that the pic is indoors. - Even though this is a simulation, I actually...

What if you are in a room and the walls, floor and ceiling are all perfect reflectors, and there's a light on in the middle of the room. How bright will it get in there?

I once had a co-worker and close friend, who was a 2nd degree black belt in Sho en ru (sp?) Karate and had his own dojo. He was practicing, teaching and of course learning a form of Zen meditation. He told that the way he looked at it was that we were all travelers on the same river. Some of us...

AP PHYSICS PROBLEM...i forgot the formula, someone help me solve! This won't take lon Light of frequency 6.0 x 1014 hz strikes a glass/air boundary at an angle of incidence, ø1. The ray is partially reflected and partially refracted at the boundary as shown. The indices are shown. (a)...

Faster than c! hi I read that the refractive index(n) for X-rays in meterials are less than 1(very little less than 1). I got confused ..I am using X-ray reflection at the moment. But I am not convinced by the fact that n<1 means faster than c(velocity of light in vacuum or in air)! hope...

Need some help on a practice physics problem. You need to place a mirror on the left wall, so that the reflected light from the bulb exactly fills the right wall. ceiling _________________________ | | |...

Hello! I am having a problem with this problem about the reflection of a "radio wave" in the high atmosphere. (ionosphere) "A short-length wave receiver receive two signals from a distant source at 500Km, beeing those signals, one from the normal conduction through the atmosphere and the...

imagine that i have a pair of LEDs throwing light on the same point on a piece of paper. This is possible if the LEDs are inclined equally at an angle to the normal coming out of paper, right? now if i consider two rays hitting the paper at the same point, then where can i explain the...

imagine that i have a pair of LEDs throwing light on the same point on a piece of paper. This is possible if the LEDs are inclined equally at an angle to the normal coming out of paper, right? now if i consider two rays hitting the paper at the same point, then where can i explain the...

Hi, I'm new here... I already read about how the signals are transmited through the fibre optical cables... total internal reflection But what I don't understand is the another day I was scribbling it on a piece of paper (the total internal reflection that is)... I noticed that from the way...

The packet doesn't explain this concept very well, and the book doesn't seem to explain it at all. A glass surface (n = 1.5) is coated with a film with an index of refraction n=1.3. If light of frequency 6x10^14 cps is incident almost normally on the film, find the minimum thickness that...

Hi, Right now I am solving some exercises in connection with wave optics. If we have three layers of different materials (ex. air, gasoline, water) and we send a light ray through these layers and we calculate the wave length of the reflected rays, then we use these formulas: D = N*l; (D =...

The Question: A 45-45-90 prism is immersed in water. What is the minimum index or fefraction the prism must have if it is to reflect totaly a ray incident normally on one of its faces. Now, we have found this question a bit hard to understand. We assume that light is hitting one of the...

i have a somewhat elusive question (for me) about light. when you drop a bouncy ball, after it hits the ground, right before it bounces back up, its velocity is zero. correct? it becomes troubling when the ball is replaced with light. when light is reflected straight back to its source, it...

I have a homework problem that I'm not sure how to figure out. What equation should I use for this? A person whose eyes are 1.8 m above the floor stands in front of a plane mirror. The top of her head is 0.12 m above her eyes. What is the height of the shortest mirror in which she can see...

Can someone explain why skylight is polarized, and how polarization occurs through reflection? Thanks.

Need urgent help with light reflection problems Here are my problems: 1) A beam of light has a wavelength of 610 nm in vacuum. a: What is the speed of this light in a liquid whose index of refraction at this wavelength is 1.45? I used n=c/v to get 2.07x10^8 m/s. This is correct. b: What is...

If a beam of light shines from the 10 on the face of a clock, reflects off a mirror in the center and strikes the 5, what is the angle of reflection. If anyone could help me, it would be much appreciated tyty.

ok, i need help with this one question. the diagram that goes with this question is at the following website: http://courseweb.edteched.uottawa.ca/phy1102A/Assignments/Problems/PHY1102A-Assignment%204_files/image005.jpg i tried attaching it but it was too big. ok so here it is: A ray of...

Hello, I am trying to write the transfer matrix for surface with an s-polarized em wave incident on it. I want to look at the case of total internal reflection- but I don't know if it makes any sense to look at the transfer matrix in that case, since there is no transfer across the boundary...

this is by no means polished. i will be working out my thoughts as i write. whenever i try to understand the concept of self, i visualize a tree. i am the tree but this physical me might only be a branch of the total me. the trunk is my core being(soul, spirit, etc?) and the big branches...

I'm doing an response on a little experiment done in class. I'm having trouble understanding some parts. If someone could reply to the information below, it would really be appreciated. A large beaker is filled with water, it is covered on the outside by construction paper (any coulour you...