Question

In fresnel's biprism value of wavelength depends upon

Answer 1

Here is Your answer---

A Fesnel Biprism is a thin Double Prism placed base to base and have a Very small Refracting angle.It is used to Determine the Wavelength(λ) of a monochromatic Light Source.

The Formula which determine the Wavelength is λ = βd/D

Where,

λ =  Wavelength 

β = Fringe Width

d = Distance between two Virtual Sources.

D = Distance between the source and the Eyepiece.

From the Formula, we can Predict that, Wavelength of the Monochromatic light Depends upon---

a). β - Fringe Width.

b). Distance between the source and the virtual source.

c). Distance between the source and the eyepiece.

Hope it helps.