When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...? Mcqs

When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...?

(A) 48.8°

(B) 50.0°

(C) 49.1°

(D) 51.0°