Question
Physics Question on Wave optics
An oil film in air of thickness 255 nm is illuminated by white light at normal incidence. As a consequence of interference, which colour will be predominantly visible in the reflected light ?
Given the refractive index of oil = 1.47
A
Red (~ 650 nm)
B
Blue (~ 450 nm)
C
Green (~ 500 nm)
D
Yellow (~560 nm)
Answer
Green (~ 500 nm)
Explanation
Solution
The correct option is (C) : Green (~ 500 nm).