Monochromatic light of wavelength in air is incident normally on a oil film floating…

PHYSICS · Subjective · CBSE · Physics · Wave Optics · Wave Optics

Problem

Monochromatic light of wavelength

600\,\text{nm}

in air is incident normally on a

n=1.25

oil film floating on water (

n=1.33

). Determine the minimum non-zero film thickness that produces constructive interference in the reflected light.