In Young's double slit experiment, to increase the fringe width

Options

A. (a)the wavelength of the source is increased
B. (b)the source is moved towards the slit
C. (c)the source is moved away from the slit
D. (d)the slit separation is increased
(e) the screen is moved towards the slit

Answer

A

Explanation

Increase the fringe width depend only the wavelength of the source is increased. By Young.s double slit experimentW
`W = ( Dlamda )/(d)`
According to equation, the fringe width is directly proportional to`lamda.`