A 40 × 10²-Nm Thick Film of Kerosene (N = 1

Multiple Choice

A 4.0 × 10²-nm thick film of kerosene (n = 1.2) is floating on water. White light is normally incident on the film. What is the visible wavelength in air that has a maximum intensity after the light is reflected? Note: the visible wavelength range is 380 nm to 750 nm.

A) 380 nm
B) 420 nm
C) 480 nm
D) 530 nm
E) 601 nm