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

Options

A. `{:(,P,Q,R,S),((A),1,2,4,3):}`
B. `{:(,P,Q,R,S),((B),2,1,3,4):}`
C. `{:(,P,Q,R,S),((C),4,1,2,3):}`
D. `{:(,P,Q,R,S),((D),4,2,3,1):}`

Explanation

F+f=ma
FR-fR=`2/5 mR^(2)alpha`
`a=Ralpha`
`f=6/7 N`
`f_(L)=0.5 NrArr `friction is kinetic
`(B) (##RES_DPP_PHY_06_E01_043_S02.png" width="80%">
4-f=ma
`4xx1/2+fxx1=2a`
f=2N
`f_(L)=3N`
(C)
`a=(g sin theta)/(1+l/(mR^(2)))=(10xx1/2)/(1+1/2)=10/3 m//s^(2)`
`mg sin theta-f =ma`
`f=(mg)/2-ma=10-20/3 =10/3 N`
`f_(L)=u_(s)N=2/5xx2xx10xx(sqrt(3))/2=4sqrt(3)` N static
`(D) (##RES_DPP_PHY_06_E01_043_S04.png" width="80%">
`f_(L)=5N`
f=10/3 N static
`F-f=ma rArr 4-f =1a`
`fxx1-4xx1/2=2xxa/R rArr f-2=2a, a=2//3 m//s^(2)`