Refraction Definition and 751 Threads

Snell's law says n1sin(theta1) = n2sin(theta2) The angle of refraction theta2 can be greater or less than the angle of incidence theta1. That's fairly obvious. My question is if theta2 = theta1 then we don't have an interface (because n1 = n2) so the light is still in the same medium, and...

If I was doing a practical on refraction, and I was using Snell's Law, what would the Aim be. Also remember that, the aim can't be to prove Snell's Law. Thanks everyone. (please hurry this assignment is due tomorrow)

1. A light source, S, is located 2.0 m below the surface of a swimming pool and 1.5 m from one edged of the pool. The pool is filled to the top with water. a) At what angle does the light reaching the edge of the pool leave the water? b) Does this cause the light viewed from this angle to...

We learning about light refraction in class the other day and I was just wondering what man made objects used it for and what man made light refraction is used for.

I am sure this topic has been discussed a million times so how can once more hurt? I am only just being introduced to physics at school and a question came to mind when I was thinking about a game called "Crysis" in which the main character can become invisible. 'Cloaking' or 'invisibillity'...

Homework Statement What are the difference among angle of incidence, reflection, and refraction when light strikes two parallel surfaces? What does it mean "light is incident on film"?-is that the angle of incidence? The Attempt at a Solution I know how to find all of...

Snell's Law -- figuring out index of refraction Homework Statement A light ray enters a rectangular block of plastic at an angle of θ1 = 45.0° and emerges at an angle of θ2 = 79.0°, as shown in Figure P35.71. (the image is of light entering the block from the west, and exiting from the...

Homework Statement A penny lies on the bottom of a pool 0.75m from the edge of the pool and 1.5m below the surface. A flashlight beam is shone over the edge of the pool to illuminate the penny. At what angle to the pool deck should the flashlight be aimed? Homework Equations ?? The...

Hello, new comer to realitivity here. My friend and I were wondering if when light refracts if the photons temporarly convert back into partial mass. Through my understanding of e=(mc^2)/sqrt(1-v^2/c^2) it appears as if they would, but since photons have an infinite amount of energy...

A Monochromatic source of light in a vacuum shines light into a block of glass. How does the amplitude of the light wave change once it is inside the glass and once it leaves the glass. I know that some energy (and hence amplitude) is lost by the light wave when it enters the glass due to slight...

Homework Statement The index of refraction for violet light in silica flint glass is 1.65 and for red light is 1.62.What is the angle of deviation for the red ray passing through a prism of apex angle 59.7 degrees. If the angle of incidence is 47.4 degrees. Homework Equations nglass...

Homework Statement One method of determining the refractive index of a transparaent solid is to measure the critical angle when the solid is in air. It Ac is found to be 40.5 degrees, what is the index of refraction of the solid? Homework Equations nsinA=nsinA The Attempt at a...

A glass Slab is placed over a page on which the word VIBGYOR is written with each letter in its corresponding colour. Will the image of all letters appear to be in the same level or will each letter be raised by different levels?

A beam of parallel light rays from a laser is incident on a solid transparent sphere of index of refraction n. (a) If a point image is produced at the back of the sphere, what is the index of refraction of the sphere. Here's the equation you use to find the index of refraction of the sphere...

Ok, I'm decided to post this here just because after searching for refraction of light, I see a lot of posts in this category. Currently in my Physics class, we're working on the theory of light in the book, Newton to Einstein the trail of light. After covering refraction and snell's law to...

A glass rod seems to disappear when it is placed in vegetable oil. Based on this observation, predict the index of refraction for vegetable oil.

Homework Statement Ligh is incident normally upon one face of a prism of glass with an index of refraction, n. The light totally reflected as shown in the picture*. What is the minimum value n can have? *Picture shows a Porro prism (45-45-90 prism) Homework Equations n sin(a) = n2 sin...

Homework Statement A beam of sunlight with a wavelength of 500 nm strikes an ice floe at an angle of 66.5 If ice has an index of refraction n=1.31, at what angle is the beam refracted? Homework Equations Law of Refraction- n(i) sin 0(i)=n (r) 0 (r') The Attempt at a Solution I'm...

Homework Statement A concave mirror (R=54cm) faces a convex mirror of the same radius. The distance between the mirrors is 54cm, and their axes coincide. A candle is held between the mirrors, 10 cm from the convex mirror. Consider light rays reflect off the concave mirror and then the...

Homework Statement The property of a transparent material that makes it useful for a lens is: this is refraction, right? In relation to this, the image of an object can't be focused correctly if a simple glass lens is placed under white light because: a)the lens absorbs light b)the glass...

Oh btw, this is not a homework question! just got it somewhere. Light travels in a medium of n=1.2 at c1. what is its speed in a medium of n=1.6? a)1.3c1 b)0.67c1 c)2c1 d)1.7c1 e)0.55c1 my solution: using n=c/v, 1.2 = c/c1. also, 1.6=c/c2. c2= c/1.6. but c=1.2c1 So, c2=(1.2/1.6)...

hi everyone, I've got another question. i feel good about my methods, but I'm getting an incorrect answer. Homework Statement A ray of light impinges at a 60° angle of incidence on a glass pane of thickness 6 mm and index of refraction 1.50. The light is reflected by a mirror that touches...

Homework Statement The figure shows a light ray incident on a glass cylinder where h = R/9. At what angle α will the ray be refracted? (Image Attached) Homework Equations n(sin(theta))= N(sin(THETA)) The Attempt at a Solution I'm not sure how to attack this problem. I've...

Homework Statement If the object distance in the following picture were 8.0 m and the image distance were 2.0 m, and the object is 0.50 m tall, how tall is the image. Ho = 0.5 So = 2.0 Si = 8.0 Homework Equations Ho / Hi = So / -Si In order these variables are hight object, hight image...

Homework Statement The problem is essentially (I've rephrased it, but this is what it is asking) show that [ (2n1cosa) / (n2cosa + n1cosb) ]2 is equal to (sin2a sin2b) / (sin2(a+b)cos2(a-b)) where these are for refraction through materials and satisfy n1sina=n2sinb 2. The...

Homework Statement A 4.0m 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 \theta = arcsin(n2/n1) n1sin\theta1= n2sin\theta2 The...

Homework Statement The glass core of an optical fiber has an index of refraction 1.62. The index of refraction of the cladding is 1.47. What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber? Homework Equations theta = sin ^-1...

I find now that there are several effects on light that are not explained by QED. This surprises me since Feynman was so fond of saying that it covered nearly all the physics we experience. So I expected to get an explanation for reflection when I watched his lectures or read his book on QED...

1. A ray of light is incident onto the interface between material 1 and material 2. There is a figure, which is a standard figure of a ray in medium of n1 striking an interface where medium2 (with n2) meets medium1. As is typical, some of the light is reflected and some is refracted. The...

Now, I've asked about this on some other forums: and it seems all people are able to to is repeat what happens at refraction, but not actually to answer the question: [PLAIN]http://ryansuchocki.co.uk/media/tmp.jpg From the above image, why does the first sittuation occur rather than the...

Homework Statement The index of refraction for a diamond for red light, 656 nm, is 2.410, while that for blue light, 434 nm, is 2.450. Suppose white light is incident on the diamond at 30.0 degrees. Find the angles of refraction for these two colors. Homework Equations n1sinangle of...

Homework Statement A piece of glass has the shape shown in the below diagram. The index of refraction of the glass is 1.45. Find the critical angle for the glass. Sketch the path of the light ray until it emerges from the side of the figure and find the last angle of refraction...

Homework Statement 1. The index of refraction for water is 1.33 and that of glass is 1.50. a. What is the critical angle for a glass-water interface?b. In which medium is the light ray incident for total internal reflection?Homework Equations nisin\varthetai=nrsin\varthetarThe Attempt at a...

Homework Statement 1. What property of light causes the sunlight to reach the Earth before the sun actually appears over the horizon? 2. What is the wavelength, in water, of blue light whose wavelength is 4.5 x 10^2 nm in air? 3.The speed of a certain liquid in a certain liquid is 3/4...

Homework Statement The critical angle of refraction for calcite is 68.4 (degrees) when it forms a boundary with water. Use this information to determine the speed of light in calcite. Homework Equations n=c/v n= Index of refraction c= Speed of light in a vacuum v= Speed of light in...

Homework Statement One of the beams of an interferometer, as seen in the figure below, passes through a small glass container containing a cavity D = 1.34 cm deep. When a gas is allowed to slowly fill the container, a total of 222 dark fringes are counted to move past a reference line. The...

Ok so I am not sure how to do this problem the only equation i am familiar with that might have to do with it but I am not so sure it is used on this problem the equation is dsin(-)=wavelength the question is 2.Compare the wavelength or frequency range of the visible light our eyes can see...

I am using the following C library for a variety of solar position calculations: http://rredc.nrel.gov/solar/codesandalgorithms/solpos/ In the library, they use the function srss() to compute sunrise and sunset times. Unfortunately, it seems that their equation is for the time that the...

Homework Statement A beam of light is emitted 8.0 cm below the surface of an unknown liquid. The light beam is angled in a way that it strikes the surface 7.0 cm from the point directly above the light source. The light beam is totally internally reflected. What is the index of refraction of...

Hi I wasn't sure of where to post, since well, I'm an adult, and math/physics weren't a big part of my curriculum, and yet, years later, i thought that continuing to have severe holes in my understanding of math and physics wasn't beneficial, even if i didn't had any direct applications to...

I am instructor for a company that does Oil well Accoustic logging. Basically we send an Acoustic pulse out and have a reciever 3' and 5' down the tool (vertically) as we log up and interpret the signal that is received back at the reciever. I was wondering if anyone can help me find...

How does the refraction index vary with wavelength? For example, if you take light that initially has just one wavelength and disperse it through a prism and calculate the different indices for each wavelength. I'm guessing they'll be different... Is it linear? exponential? etc.

A few years ago when I was doing my Physics A-Level, me and a few others took part in a competition in which we had to perform a short play that educated a group of non-scientists about a something to do with physics. We chose refraction and showed how a laser bent in a fish tank at different...

Homework Statement A ray of light strikes the midpoint of one face of an equiangular (60◦, 60◦, 60◦) glass prism (n = 1.3) at an angle of incidence of 33◦. a.Trace the path of the light ray through the glass, and find the angle of refraction at the first surface. b.Find the angle of...

Dear readers, In my recent study of dyadic products I found out that physical quantities expressend as 2nd rank tensors can also be expressed as a dyadic product of two vectors. Similarly 2nd rank tensor fields can be expressed as pointwise dyadic products of two vector fields. One such...

Consider a ray of light in air traveling towards a medium 1 and then subsequently to a medium 2 and then back to air again undergoes refraction at every pair of media. Let us say that the initial incident angle between air and medium 1 is 'i'. What law states that the emergent ray at then end...

I was thinking about and I think it might be possible, but before I do anything stupid, anything have an opinion about this?

Hi All, I'm studying for a Ham Radio test and can't for the life of me understand the mechanism behind higher (in this case, Radio) frequencies leading to less refraction in (again in this case, the ionosphere) mediums. I'm sure light waves/dense transparent media has the same explanation...

Homework Statement If the sound wave hits the cold air interface at an angle of 60, what is the angle of refraction? The speed of sound as a function of temperature can be approximated by v = (331 + 0.60T) m/s, where T is in Celcius. Homework Equations The Attempt at a...

Homework Statement A layer of ice having parallel sides floats on water. If light is incident on the upper surface of the ice at an angle of incidence of 15.0°, what is the angle of refraction in the water? Homework Equations The Attempt at a Solution i know its not so simple that...