The contrast in the fringes in any interference pattern depends on:

Options

A. fringe width
B. wavelength
C. intensity ratio of the sources
D. distance between the source

Answer

C

Explanation

contrast indicates the ratio of maximum possible intensity on screen to the minima possible intensity.
As `(I_(max))/(I_(min))=(sqrt(I_(1))+sqrt(I_(2)))^(2)/((sqrt(I_(1))-sqrt(I_(2)))^(2))`
So it only depends on the source intensity