Question

Find the thickness of a plate which will produce a change in optical path equal to half the wavelength λ of the light passing through it normally. The refractive index of the plate is μ.

Answer 1

Answer:

the thickness of a plate which will produce a change in optical path is λ/(2(μ-1)

Explanation:

The refractive index of plate be μ

Let t be the thickness of plate t to  produce Optical path difference =λ/2

Formula for optical path difference =

=(μ-1)t

∴(μ-1)t =λ/2

t= λ/(2(μ-1)

∴Find the thickness of a plate which will produce a change in optical path is λ/(2(μ-1)

Answer 2

Answer:

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