Question

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

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

Answer 1

The correct option is C $\pi$

When light suffers reflection at the interference between air and glass, the charge of phase of reflected wave is ${180}^o$