Question

, In a uniform transparent medium with refractive index n, the wavelength of monochromatic light in vacuum propagates from point A to point B along a certain path. If the phase difference between point A and point B is , the optical path of path AB is:
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Answer 1

Answer:

λ is the wavelength of light in air.

Let t be the distance between points S and A.

Optical path length travelled by light via SB =μ(t+x)

Optical path length travelled by light via SA =μt

Path difference between points A and B Δx=SB−SA=μx

Now phase difference, ϕ=Δx×

λ

2π

Hence, ϕ=μ(

λ

2π

)x

Explanation:

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