- #1

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## Homework Statement

There is a diagram in the problem statement so here is a link to the image of the problem:

http://imgur.com/KDrRsyO

## Homework Equations

Snell's Law:

[itex]n_{1} * sin(\theta_{1}) = n_{2} * sin(\theta_{2})[/itex]

## The Attempt at a Solution

My attempt using Snell's law fails because I can't see how it is possible that n ever becomes squared. It looks like either some sort of vector addition or some use of Pythagorean theorem but I haven't been able to determine how to use those ideas to solve the problem.

I can see some use of special triangles given the angles are 60 degrees, but it's a bit overwhelming and my trig skills are a bit rusty.

Thanks.