A diver shines a light up to the surface of a
flat glass-bottomed boat at an angle of 20◦
relative to the normal.
If the indices of refraction of air, water,
and glass are 1.0, 1.33, and 1.4 respectively,
at what angle does the light leave the glass
(relative to its normal)?
Answer in units of degrees.

You need to use sneels law n*sinθ=n*sinθ and you would use it 2 times cause it refracts when going from air to water and then water to glass

I already solved it