In Young's double slit experiment, the distance between two slits is made three times then the fringe width will become ......

Options

A. 9 times
B. `(1)/(9)` times
C. 3 times
D. `(1)/(3)` times

Answer

D

Explanation

The fringe width in Young.s double slit exeperiment
`beta=(lambdaD)/(d) and beta=(lambdaD)/(d)`
Taking =3d
Taking `d=3d`
`beta=(lambdaD)/(3d)`
Hence it will be `beta=(beta)/(3),(1)/(3)` times