Question

8. Light of wavelength, enters a medium with refractive index n, from a medium with refractive
index n. What is the wave lenght of light in second medium? (AS
)​

Answer 1

Answer:

Bϕ 0

=n( λ 02π )x

Explanation:

λ

o

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 =n(t+x)

Optical path length travelled by light via SA =nt

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

Now ϕo

=Δx× λ o2π

Hence, ϕo

=n( λo2π)x