Refraction Definition and 726 Threads

https://www.physicsforums.com/showpost.php?p=899393&postcount=4 describes why photons are slower in some medium. After reading it, I've few more questions: When a photon hits an electron, if it absorbs the photon and reemits, here's my questions: 1. How does refraction possible? The...

Please Explain Me Refraction of light ! Helo everyone, I have gone through my textbooks which only comes to the conclusion that since the light travels at different velocity in different medium so it bends at the interfaces. This is something i can't really understand. It doesnot make anything...

Determine the time it takes for light to travel 54 cm through glycerine in an aquarium. Do I account for air, glycerine and glass?

Homework Statement A light ray enters a rectangular block of plastic at an angle 1 = 44.0° and emerges at an angle 2 = 79.0°, as shown in Figure P22.61. Figure P22.61 (a) Determine the index of refraction of the plastic. wrong check mark (b) If the light ray enters the plastic at a...

light refractions problem I don't even know where to start with this problem. Can someone please help me out? As shown in Figure P22.49, a light ray is incident normal to on one face of a 30°-60°-90° block of zircon(n= 1.923) that is immersed in water. Figure P22.49 (a) Determine the...

Homework Statement under what condition is the angle of incidence greater than the angle of refraction?and viseversa? and WHY? AND how come the speed of light slows down when it travels from a less dense to a more dense substance?and vise versa? Homework...

How to explain transmission, reflexion, refraction and diffraction at a atomic level. For example: 1 - how does light passes through a transparent material? 2 - what happens in the boundary of separation of two materials for light to be: partially reflected, partially refracted ad partially...

Homework Statement Suppose a convex lens is ground so that one surface has a radius of curvature of 30.0 cm and the opposing surface has a radius of curvature of 40.0 cm. The focal length is 34.2cm. What is the index of refraction of the lens? What kind of glass is the lens? Homework...

Suppose a convex lens is ground so that one surface has a radius of curvature of 30.0 cm and the opposing surface has a radius of curvature of 40.0 cm. The focal length is 34.2cm. What is the index of refraction of the lens? What kind of glass is the lens? Need help by using the formula...

Homework Statement In which of the following situations will light from a laser be refracted? a. traveling from air into a diamond at an angle of 30° to the normal b. traveling from water into ice along the normal c. upon striking a metal surface d. traveling form air into a glass of...

I tried to obtain refraction of light by sun's gravity by substitution of sun's gravitational field by aether with different speeds of light. I do not get right result. Where I am wrong? For light which travel close to the sun by direct trajectory, I get the following speed of light in...

I just wanted to ask a quick question that maybe someone knows off the top fo their head. How does the refraction angle of the Sun at the sunset vary as a function of the observer's height. i.e. if you are standing on a tower looking over the ocean, is the refraction deviation of the Sun at...

can you please explain some of these questions to me? Thanks. In the PR book, it defines vacuum as empty space and I don't really know what that means. Does it mean that there is nothing (no air molecules, no other gasses, etc.) in that space? (is the atmosphere of space a vacuum also?) I've...

A light beam passes from medium 1 to medium 2 with the latter being a thick slab of material whose index of refraction is n2. Show that the emerging beam is parallel to incident beam. Am I correct in assuming that the only way this is possible is to have the incident beam making an angle that...

According to Fermat's principle the path taken between two points by a ray of light is the path that can be traversed in the least time. So if the ray is refracted and if you take two points, one from before and one from after the refraction, the path taken between them was the one that takes...

Homework Statement Why do fish appear bigger when you look at them through a fishbowl? Homework Equations The Attempt at a Solution because objects in water appear bigger than they actually are? this has to do with change in the medium from air n1 to water n2?

Homework Statement At the shallow end of a swimming pool, the water is 70.0 cm deep. The diameter of the cone of the light emerging from the water into the air above, emitted by a light source 10.0 cm in diameter at the bottom of the pool and measured by an observer on the edge of the...

Hello I'm trying to solve a problem where I'm asked to find the optimum index of refraction for an antireflective coating on a piece of glass. In trying to derive an equation for it I keep coming across this in the internet (where 1,0, and s should be subscripts) n1=sqrt(n0ns) where n1 is...

Homework Statement A 4.0-m-wide swimming pool is filled to the top. The bottom of the pool becomes completely shaded in the afternoon when the sun is 20 degrees above the horizon. How deep is the pool?Homework Equations Snell's law (n1)sin(x1) = (n2)sin(x2) Index of Refraction of Air = 1 Index...

Hi, I'm working on a project on the Green Flash and have so far been building up a program to produce the 1976 US Standard Atmosphere. I have produced the density profile for the first 86km (which I'll assume to be enough for now) and now need to convert it to a refractivity index profile...

How does one measure the index of refraction of a liquid, more specifically the angle of refraction? I'm finding it's relationship to temperature. I can't just dip the protractor into the liquid( as a test medium I used water compared to air) and measure the angle that is in the water(either...

Refraction problem! Homework Statement A beam of white light is incident on the surface of a diamond at an angle Theta_a. Since the index of refraction depends on the light's wavelength, the different colors that comprise white light will spread out as they pass through the diamond. For...

Can anyone please prove that if d1=EF and if d2=EG and angle MEZ=HEF=angle of incidence and angle HEG = angle of refraction. Please! can somebody help me prove that d1/d2=refractive index taking sin i/sin r=refractive index (The glass slab is ABCD and is kept in vacuum)

i need an explanation for this situation. i've inserted an pingpong ball into a glass full with water (the glass is made out of thick glass if it matters somehow?). Now what happened is that the half of the ball that is in the water looks much bigger than the half that is not in the water...

This article is as good as any tutorial on the physics of negative index of refraction. It was co-written by John Pendry, who has been credited for inventing/discovering the metamaterial that exhibits this property.Zz.

hi.i m kinda new at this but i really need help in physics.i m stuck so much.ok i have tried this question but i don't get it even though i have followed the steps that is shown in the book. A layer of olive oil (n=1.47) floats on water. What is the critical angle for a ray directed from the...

Question: A lens produces a real image that is twice as large as the object and is located 15 cm from the lens. Find (a) the object distance and (b) the focal length of the lens. m = \frac{-i}{p} So the image is twice as large so obviously m = 2 . The lens produces a real image that...

Homework Statement A glass cube has a small spot at its center. What parts of the cube face must be covered to prevent the spot from being seen, no matter what the direction of viewing? What fraction of the cube face must be covered? Assume a cube edge of 1 cm and a refractive index of 1.50...

For instance, how would a "gem" made of negative refraction index material appear next to a diamond?

i am perplexed at the spectrum. :confused: when a light beam passes through the spectrum,different color of light appears. is the wavelength, frequency, and speed different in different color of light?:eek: is the wavelength of the light changes in the spectrum? :!) the level of refraction...

can someone explain to me how sundogs form? I know it has to do with refraction of light through ice crystals but i need a good ray diagram explaining this...

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...

Basic angles of refraction and incidence help needed (help still needed) I feel silly for even asking this, but here goes. http://img501.imageshack.us/img501/905/refractionpuzzlerg2.gif The triangle represents a glass prism. The refractive index between air and the prism is 1.55. The...

We are learning about refraction of light at school and we did an experiment with a semi circle plexi glass We shone a ray of light at the plexiglass at different angles to find out the different angles of refraction. When we had the semicircle plexiglass upside down, meaning curved part...

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...

Two non-parallel light rays initially converge to a single point on a screen. A rectangular block of glass is now placed somewhere in front of the screen, in the path of the light rays, so that the glass surface is parallel to the screen. Where is the new convergence point of the rays? 1...

"An electromagnetic radiation has a frequency of 5 x 10^14Hz a) (wave in vacuum = 600nm) b) (wave in water = 440 nm) c) what is the index of refraction of a medium in which the speed of this radiation is 2.54 x 10^8 m/s?" so given: c = 2.54 x 10^8 m/s f = 5 x 10^14Hz...

I can't seem to figure these out guys...maybe I'm missing a few equations too. 1. If light of wavelength 600nm in air enters a medium with index of refraction 1.50, its wavelength in this new medium is... A. unchanged B. 900nm C. 400nm D. 602nm ---I know that n=c/v...but I don't...

OK, so i think i get why refraction happens and it makes sense that as the light passes into something of a higher refractive index it will decelerate and if it hits at an angle, one "edge" of the beam will hit first and thus descelerate before the other side of the beam causing the beam to...

I have a question concerning this question: Predict what will happen as the incident angle approaches 90 degress, and develop a method to test the prediction. I say the refraction angle would also be 90 degrees (remaining a horizontal line), so my method would be to align the laser I'm...

The drawing shows a rectangular block of glass (n = 1.52) surrounded by liquid carbon disulfide (n = 1.63). A ray of light is incident on the glass at point A with a theta = 23.0° angle of incidence. At what angle of refraction does the ray leave the glass at point B...

Why is it that the refracted angle > the incident when light moves from a more dense material to a less dense? Is there any way to explain why the angle would be greater? I know the velocity would increase. Wavelenght increases. Frequency remains the same. Correct?

For each of the following cases, will the light rays be bent toward or away from the normal? a. ni > nr, where the angle of ni = 20 b. ni < nr, where the angle of ni = 20 c. from air to glass with an angle of incidence of 30 d. from glass to air with an angle of incidence of 30 for...

A cylindrical opaque drinking glass has a diameter of 4.7 cm and a hieght h. An observer's eye is placed to where they are just barely looking over the rim of the glass. When the glass is empty, the observer can just barely see the edge of the bottom of the glass. When the glass is filled to be...

When constructing a Rayleigh Refractometer the formula for the refractive index of a gas at pressure P and temperature T is: mu(P,T) - 1 = (gamma) P/T where, mu(P,T) = refractive index as a function of pressure and temperature and gamma = [n(lambda)Ta]/[L(deltaP)] where, n = fringe...

When constructing a Rayleigh Refractometer the formula for the refractive index of a gas at pressure P and temperature T is: mu(P,T) - 1 = (gamma) P/T where, mu(P,T) = refractive index as a function of pressure and temperature and gamma = [n(lambda)Ta]/[L(deltaP)] where, n = fringe...

Hey , I need some indication to solve this problem: A ray light impinges at a 60 degres angle of incidence on a glass pane of thickness 5mm and index of refraction of 1.54. the ligth is reflected by a mirror that touches the back of the pane. By how much is the beam displaced compared with...

I've gotten stuck on the following problem: The drawing shows a rectangular block of glass (n = 1.52) surrounded by liquid carbon disulfide (n = 1.63). A ray of light is incident on the glass at point A with a = 34.0° angle of incidence. At what angle of refraction does the ray leave the...

A block of crown glass (refractive index - 1.52) is covered by a sheet of water (refractive index - 1.33). a ray of light incident on the water with a angle of incidence of 55 degrees. find the angle that this ray makes with the normal when it emerges from the glass... PLEASE help, this is...

Question A laser beam travels from air into a symmetrical prism at right angles close to its upper edge. The refractive index of the prism material n = 1.4 and its angle is 30 degrees. i) Calculate the critical angle for the prism-air interface. Possible Answer: Critical angle =...