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

A fish is 30 cm below the surface of a lake.

If he looks up he can see the entire sky compressed in a cone of angle θ, because of refraction of light at the water surface. (θ is the angle between the cone axis and the cone surface.) Determine θ.

2. Relevant equations

n1*sin(theta 1)=n2*sin(theta 2)

n1=1

n2=1.33

theta 1=90

theta 2=?

3. The attempt at a solution

sin(90)/1.33=sin(theta 2)

sin^{-1}(0.672177943)=42.24 degrees

This doesn't seem to be the answer though...

Any help?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Snell's Law Problem

**Physics Forums | Science Articles, Homework Help, Discussion**