(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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.

http://img179.imageshack.us/img179/6531/physicsimageez8.png [Broken]

Sorry if the image is a little ugly...

2. Relevant equations

Snell's law

[tex]n_1\sin\theta_1 = n_2\sin\theta_2\ .[/tex]

3. The attempt at a solution

sin-1([tex]\frac{1}{1.45}[/tex])=43.6 degrees.

I have no idea on how to draw in the diagram. Could someone help me on drawing it? Mine just looks like a bunch of rays bouncing around inside an irregular pentagon on my paper when I try it.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Critical angle/ last angle of refraction

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