A ray of light is incident on a boundary between air and water
PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
A ray of light is incident on a boundary between air and water.
Under which conditions is the ray of light totally internally reflected?
(A) The ray, initially in the air, is incident on the air–water boundary at any angle of incidence.
(B) The ray, initially in the air, is incident on the air–water boundary at an angle of incidence greater than the critical angle.
(C) The ray, initially in the water, is incident on the water–air boundary at any angle of incidence.
(D) The ray, initially in the water, is incident on the water–air boundary at an angle of incidence greater than the critical angle.