Question

The Young's double interference experiment, the slit separation is made 4 fold, the fringe width becomes
(A) 4 times
(B) 1/4 times
(c) 1/2 times
(D) 16 times

with exaplenation​

Answer 1

in ydse,

the fringe width is given by

: D¥/d

where 'd' is the separation between the slits

when d=4d,

then

fringe width becomes D¥/4d

ie. 1/4 times of initial.

hence,option(B) should be correct.