If light is incident on a plane surface at 38 deg and is deviated 15 deg, what is the angle of refraction?

r = 23°

Explanation:

given,

light is incident on the plane surface at (i) = 38°

the angle of deviation (d) = 15°

angle of refraction (r) = ?

angle of refraction is the angle made by the refracted ray with the normal.

angle of deviation is the angle between the refracted ray with the original path of the ray.

r = i - d

r = 38° - 15°

r = 23°

hence, the angle of refraction r = 23°