Total internal reflection Definition and 88 Threads

Hi all, From what I understand, total internal reflection reflect 100% of light. Suppose you had a transparent material with a critical angle of 45 degrees. Now say you had a cone with a 45 degree angle, and you shined monochromatic light in through the base. Would 100% be reflected (minus...

I would like to know if there is change of phase during total internal reflection. (In particular I would like to know if I can cover copper with several microns of glass and have it reflect 200 MHz EM waves coming from water (epsilon(H2O)=80, epsilon(glass)=4)).

A mixture of red and violet light is incident on a glass-air interface. The indices of refraction for red and violet light in glass are n(red)=1.52 and n(violet)=1.538. What color of light enters the air? http://www.webassign.net/cj8/q_10.gif attempt to solve: I found that the critical angle...

Homework Statement A plane wave is incident at 70˚ to surface normal traveling within a medium with relative permittivity = 4, striking the boundary with air. Where is the nearest magnetic field max. to the boundary in the initial medium? Find the 1/e penetration depth of the evanescent...

Homework Statement What is the maximum value of θ1 that would cause total internal reflection to occur? N1 = 1.3, n2 = 1.6 (picture attached) Homework Equations Critical angle = sin^-1(n1/n2) The Attempt at a Solution I figured the critical angle to be 54.3. That means that...

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...

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...

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

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...

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?

Homework Statement To find the total internal reflection. This equation should give me 1.48 as the answer but it doesn't. Can you please give me other ways to figure this out. I really need this. Homework Equations n1sin1Ө=n2sin2Ө n1 = 1 n2 =? sin1Ө = 44 degrees sin2Ө = 48 degrees...

Homework Statement The prism is replaced by a new prism of the same shape, which is set in the same position. The light beam experiences total internal reflection at the right surface of this prism. What is the minimum possible index of refraction of this prism? Homework Equations...

Homework Statement Light is incident normally on the short face of a 30-60-90 (degree) prism. A drop of liquid is placed on the hypotenuse of the prism.If the index of the prism is 1.68, find the maximum index that the liquid may have if the light is to be totally reflected. Homework Equations...

Why does total internal reflection happen in glass?

In Diamonds, light that enters gets trapped within due to total internal reflection, defined as: Total internal reflection is an optical phenomenon that occurs when a ray of light strikes a medium boundary at an angle larger than the critical angle with respect to the normal to the surface...

[Solved] Total internal reflection, underwater light? Homework Statement A point source of light is at the bottom of a koi pond, at a depth of 0.525 meters. What is the radius of the circle of light formed on the water's surface? Take the index of refraction of water to be 1.33. Hint: Some of...

Homework Statement -Behind a glass container with water, there is a candle. The container is paralelopiped - shaped. What is the image that the viewer is going to see, if the eye is set like so, that he watches the candle with an angle greater than the angle of total reflection? -Hold a...

http://img210.imageshack.us/img210/6094/questionuz8.png i) What is the angle of refraction of the ray RS after it strikes the glass prism of refractive index=1.5? ii) If the critical angle is 41.8 degrees, deduce whether the ray will suffer total internal reflection. 2. Homework Equations ...

I have written in my notes the following: "Total internal reflection will have reflecting ray only, same as incident (60 degrees)." I understand everything but the 60 degrees part. If there is total internal reflection, will the angle of reflection and the angle of incident both always be...

Why is it that T.I.R. only occurs when a light is traveling from a denser to a rarer medium? Intuition suggests that this should happen when going from a rarer to a denser medium. Care to get into some mathematics? Also, can the interface between 2 media be designed so that there is 100%...

Question on total reflection...if you were to conceal a coin, by putting it under a beaker whose lid is covered with foil, and you slowly add a liquid until the coin seemingly disappears, which would require a greater volume? oil or water?

[b]1. A white light source is below the lower surface of a piece of optical-quality glass. The glass has an index of refraction of 1.520 for red light and 1.538 for violet. If you were able to move your eye at any angle relative to the perpendicular to the glass, calculate A) Which color...

Regarding "Total Internal Reflection" Hi, and thanks in advance for viewing this post. I'd like to type out the question first; Q: Consider the optical interface between crown glass and ethanol. a) Under what conditions would total internal reflection be possible at this interface? Illustrate...

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 The refractive index of the Earth's atmosphere is: n=1.01+(alpha)(R-r) where (alpha) is a constant, r is radial distance from Earth's centre and R is the Earth's radius. By considering a path comprising a series of total internal reflections or otherwise, find a value of...

As the angle of incidence increases, the angle of refraction becomes larger. Should the underlined word be decreases? why? I think I've found a mistake in the book because according to snell's law of refraction n1sin(theta)1=n2 sin(theta)2 right? If n1>n2 then (theta)1<(theta)2 Wait, I...

While making calculations of FTIR/tunneling isn't that hard, I don't understand the phenomenon, and therefore there are some predictions I'm unable to make. So I have some questions (or it's probably just one). If you have a prism with refractive index n in vacuum, total internal reflection...

Homework Statement In the case of total internal reflection, show that the average rate of energy transport across the boundary is zero. Homework Equations None Provided The Attempt at a Solution All that I have come to is that I should use some form of the following method to find...

How do the angle of incidence relate mathematically with the angle of reflection after the critical angle, that is, in a TIR? Say we have a person standing at the bottom of a swimming pool, if we take the n for water as 1.33 and for air as 1, we get the critical angle of 48.75 degrees. When the...

hey so I'm doing this question on total internal reflection and have got myself totally lost here is the question: what is the smallest angle \theta(1) for which a laser beam will undergo TIR on the hypotenus of this glass prism? after reflecting off the hypotenuse at \theta(c) the...

Can someone explain the phenomenon of total internal reflection?

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

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 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...

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...

If anyone could provide some insight into how I might go about solving this problem it would be greatly appreciated. Q: A ray enters the flat end of a long rectanglular block of glass that has refractive index n_2 as shown in the following figure. Show that all the entering rays can be...

The drawing shows an optical fiber that consists of a core made of flint glass (nflint = 1.667) surrounded by a cladding made of crown glass (ncrown = 1.523). A beam of light enters the fiber from air at an angle q 1 with respect to the normal. What is q 1 if the light strikes the core-cladding...