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In YDSE, let A and B be two slits. Films...

In YDSE, let A and B be two slits. Films of thickness `t_(A)` and `t_(B)` and refractive `mu_(A)` and `mu_(B)` are placed in front of A and B, respectively. If `mu_(A) t_(A) = mu_(A) t_(B)`, then the central maxima will

A

not shift

B

shift towards `A`

C

shifts towards `B`

D

Option (B),if`t_(B)gtt_(A)`,option (C ) if`t_(B) lt t_(A)`

Text Solution

Verified by Experts

The correct Answer is:
D
Path difference`=(S_(2)P-t_(B)+mu_(B)t_(B))-(S_(1)P-t_(A)+mu_(A)t_(A))`
Path difference=`(S_(2)P-S_(1)P)+(t_(A)-t_(B))+(mu_(B)t_(B)-mu_(A)t_(A))`
since `mu_(B)t_(B)=mu_A t_A`,so
path difference=`(S_(2)P-S_(1)P)+(t_(A)-t_(B))`
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