Monochromatic Light $\lambda$ = 500 Nm)is Incident on a Soap Bubble (N =

Multiple Choice

Monochromatic light ( $\lambda$ = 500 nm) is incident on a soap bubble (n = 1.4) that is 500-nm thick.Calculate the change of phase of the light that penetrates the front surface,reflects from the second surface,and emerges through the first surface as an angle between 0 $\degree$ and 360 $\degree$ ?

A) 280 $\degree$
B) 160 $\degree$
C) 220 $\degree$
D) 100 $\degree$
E) 290 $\degree$