Athin film of oil (n = 1.38) of thickness 432 nm with air on both sides is illuminated with white light at normal incidence. determine the most strongly and the most weakly reflected wavelengths in the range 374 nm to 506 nm. (enter your answers in nm.)

Explanation:

Given that,

Thickness = 432 nm

n = 1.38

We need to calculate the value of 2nt

For dark fringe,

For bright fringe

Put the value into the formula of bright fringe

We need to calculate the wavelength

(a). For strongly reflected

Put the value into the formula

Here, m = 2

We need to calculate the wavelength

(b). For weakly reflected

Put the value into the formula

Here, m = 2

Hence, This is the required solution.

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