The index of refraction of a substance is 1.5. find the sine of the angle of refraction if the sine of the angle of incidence is 0.15.
sin r =

For this, we use the Snells Law to determine the angle of refraction of the substance. It  is a formula used to describe the relationship between the angles of incidence and refraction. We do as follows:

n1sinФ1 = n2sinФ2
1.5(0.15) = sinФ2
sinФ2 = 10 degrees