A parallel beam of white light is incident normally on a water film 1.0 × 10^-4 cm thick. Find the wavelength in the visible range 1400 nm-700 nm) which are strongly transmitted by the film. Refractive index of water = 133.

Question

Philoid · Accepted Answer

Given, refractive index,

And thickness of the film be the

Here, the light is strongly transmitted.

therefore,

now, for n=4

now, for n=5

now, for n=6

A parallel beam of white light is incident normally on a water film 1.0 × 10-4 cm thick. Find the wavelength in the visible range 1400 nm-700 nm) which are strongly transmitted by the film. Refractive index of water = 133.