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.
n1*sin(theta 1)=n2*sin(theta 2)
The Attempt at a Solution
This doesn't seem to be the answer though...