question_answer

Light is incident from a medium into air at two possible angles of incidence \[20{}^\circ \]and \[40{}^\circ .\]In the medium light travels 3.0 cm in 0.2 ns. The ray will:

A) suffer total internal reflection in both cases and

B) suffer total internal reflection in case only

C) have partial reflection and partial transmission in case

D) have 100% transmission in case