Refraction Definition and 751 Threads

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 =...

This seems really easy but I am having a really hard time getting the correct answer to this question. Any help would be much appreciated. A ray in air is incident on a glass plate whose index of refraction is 1.60. The angle of refraction is one half the angle of reflection. The angle of...

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...

Okej have a piece of glass with refractive index n2 and tickness t. A ray of light falls on the glass with the angle theta1 (from a medium with recrative index n1). In the glass the ray has the angle theta2 and when it exits it has now got the displacement d (compared with the ray that...

Hi can u please explain me the difference between refraction and diffraction?

Given any index of refraction, how would I find a wavelength in that medium? Should I use frequency= c/wavelength? For example, if a piece of glass (medium) has a index of refraction 1.12, what's the wavelength?

Just to clear things up... does a greater index of refraction mean that the light bends more or less?

A parallel beam of light containing two wavelengths, 1 = 400 nm and 2 = 650 nm, enters the silicate flint glass of an equilateral prism with an angle of incidence of 49 degrees. At what angle, relative to the normal, does each beam leave the prism? This seems simple, but previously, I had...

Why would one need to use a complex index of refraction? Are there circumstances in which the ordinary index of refraction breaks down? What are they?

I am having a little bit of trouble finding the speed of light in a given medium when you are only supplied with the index of refraction. For example, I was given that n=1.36 in ethanol, and I had to find the speed of sound in ethanol. I know the equation for the index of refraction is n=c/v...

Suppose that you look at an aquarium with your eyes at the lever of the water surface. A duck swims on the surface of the water. When you look at the duck from the front, everything seems normal. However, when you look at the duck at an angle to the glass surface, the duck seems to be spilt in...

An observator is looking at a coin that is located on a swimming pool's floor with a depression Angle of 48 degrees. Knowing that the swimming pool's depth is 2.6 metres, calculate the depth that the observator can see. (Usually when you look at a swimming pool from with a smaller depression...

I'm asked to prove that the condition for the existence of an energy gap at the boudnry of the Brillouin zone on a 1D lattice is equivalent to the condition for Bragg refraction. I don't understand this question. Doesn't an energy gap arise solely when there is a potential? Meanwhile, Bragg...

imagine there is a spherical glass object with index of refraction N is that possible that for some N and angle of incidence A, the light will be total internal reflected forever. In other word, the light will travel within the object forever? i have been trying to proof it. but i don't know...

Take a beam of monochromatic light pointed at a sheet of quartz 2" thick. The beam is striking the surface of the quartz at a fixed angle different than zero. Part of the beam will be reflected and another part of the beam will be refracted. Its exact path through the sheet will depend on the...

1) Find the maximum refracting angle which a crown glass prism (1.52 refractive index) may have if sodium light is to pass through it with two refractions and no reflection? What deviation will be caused? 2) A beam of light strikes a water surface (refractive index 1.33) abd some of it is...

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...

Hi guys. I'm doing this science fair project and I needed to know if there is a substance (any substance!) whose index of refraction can be changed/regulated by applying an electric current (or any other action) to it. I appreciate all help. Thanks!

Hi I have a good understanding of the refraction of light and the reason it occurs etc. but what is confusing me is the exact reason for the "slowing" and hence bending of light inside a transparent material. What are the exact properties that allow a transparent material to slow a beam...

Red light travels from air into liquid at an angle of incidence of 39 degrees and an angle of reflection of 17 degrees. Calculate the wavelength of the red light in the liquid if it's wavelength in the air is 750nm. If someone coule tell me how to go about this question that would be very...

this is my first post in this forum. i have a question : i have read that when light refracts into other medium its frequency remains unchanged but velocity and wavelength changes. there is a formula to it : v=n*lamda (v=velocity,n=freq,lambda=wavelength) Q1: why the freq remains...

An empty flask containing some chalk pieces is placed inside a beaker full of water. When look horizontally, the flask appears to be larger than it really is. why? and when looked verticlaly down, the content of the flask shrinks, or even disapperas. why?

I want to understand why pressure creates gravity under GR (not how, why). What kind of pressure are we talking about here? Is this just the potential energy of pressure acting as mass? And the second part: I've been trying to model gravity as refraction of masses moving with constant...

my brain is fried...and I need help again. How do I find the index of refraction again??

Critical angle... Is the formula: sin(critical angle) = 1/ mu, only true light is moving from one medium into air/ a vacuum? Thanks in advance. :smile:

another refraction question?? The left end of a long glass rod 6.00 cm in diameter has a convex hemispherical surface 3.00 cm in radius. The refractive index of the glass is 1.60. Determine the position of the image if an object is placed in air on the axis of the rod at the infinitely far...

hello again: A Spherical Fish Bowl. A small tropical fish is at the center of a water-filled spherical fish bowl 28.0 cm in diameter. Find the apparent position of the fish to an observer outside the bowl. The effect of the thin walls of the bowl may be ignored. i'm dealing with the...