A light ray is incident or glass from air at 60 degree to normal. calculate the angle of refraction of the refractive index of water is 4/3

The angle of refraction θ₂ = 40.51 degree

Explanation:

given data

ray incident = 60 degree

refractive index of water = 4/3  = 1.333

solution

we will use here Snell's law that states as

n₁ sin θ₁ = n₂ sin θ₂    1

here we take refraction of air n₁  = 1

so put value in equation 1 we get

1 × sin60 = 1.333 × sinθ₂  

sinθ₂  = 0.6496

θ₂ = 40.51 degree