Question

When light suffers reflection at the interface between water and glass, the change of phase in the reflected wave is

• A. Zero
• B. $\pi$
• C. $\pi$/2
• D. 2$\pi$

Answer 1

The correct option is B $\pi$

On reflection from denser medium, phase reversal occurs i.e. phase change $=\pi$ takes place, because glass is much denser than water.