question_answer

When light wave suffers reflection at the interface between air and glass, the change of phase of reflected wave is equal to

A)  Zero           

B)  \[\pi /2\]

C)  \[\pi \]           

D)  \[2\pi \]

Correct Answer: C

Solution :

 The reflection of light wave is shown as The change of phase of reflected wave is\[180{}^\circ \].