# Homework Help: Angle to the Normal and reflection/refraction HELP

1. Apr 30, 2012

### jkeyes2

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

Light incident from air strikes a diamond at 30°
a) At what angle to the normal a is the light reflected back into air?
b) At what angle to the normal a is the light refracted inside the diamond?
c) At what angle to the normal b is the light incident on the back side of the diamond?
d) At what angle to the normal b is the light reflected on the back side of the diamond?
e) at what angle to the normal b is the light refracted back into air on the back side of the diamond?

I am given that for the diamond, n= 2.4
The image given is attached.

2. Relevant equations

I thin my main question is what equation do I use? I think it is something like sinθ(n/something)

3. The attempt at a solution

I would really like to figure out the answers myself I think. I just need help getting started. Could you explain how to get started with this?

Any and all help is greatly appreciated. Thank you for your time! :-)

#### Attached Files:

• ###### physics problem.JPG
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Last edited: Apr 30, 2012