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In a Young's double slit experimental ar...

In a Young's double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive indec `mu` is placed in front of the slit `S_1`, then the path difference `(S_1P-S_2P)` is

A

(a) Decreases by `(mu-1)t`

B

(b) Increases by `(mu-1)t`

C

(c) Does not change

D

(d) Increases by `mut`

Text Solution

Verified by Experts

The correct Answer is:
B
Path difference at `PDelta=(S_1P+(mu-1)t))-S_2P`
`=(S_1P-S_2P)+(mu-1)t`
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