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 = 1.40) .How thick is the bubble (in nm) if destructive interference occurs in the reflected light?

A) 102
B) 179
C) 54
D) 1
E) 89