What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film =1.5, wavelength of the light incident on t…

Question

What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film =1.5, wavelength of the light incident on the film =600 nm.

Accepted Answer

Correct answer: A. (a): The condition for constructive interference in a thin film of thickness t and refractive index in the reflected system, for normal incidence is 2 μt=(n+ 12) , wheren=0 ,1 ,2 ,3 , For minimum thickness, n=0 ∴2 μt= 2 ;t= 4 = 600 10^-94 1.5=100 nm

$What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film , wavelength of the light incident on the film .$

Solution

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