Question

In interference pattern, using two coherent source of light the fringe width is .....
A)directly propotional to wevelenght
B)inversely proportional to sq. of the wevength
C)inversely proportional to wevelenght
D) directely propotional to sq. of the wevelength

Answer 1

option a) is correct

Answer 2

Answer: A)directly proportional to wavelength

Explanation:

For interference pattern formed by two coherent sources of light, the following relation is used:

β = (Dλ)/d

where, β is the fringe width, D is the distance between source and screen, d is the distance between two coherent sources and λ is the wavelength of light.

Thus, we can note from this relation that fringe width is  directly proportional to the wavelength of the light. correct option is A.