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In the YDSE shown the two slits are cove...

In the `YDSE` shown the two slits are covered with thin sheets having thickness `t` & `2t` and refractive index `2mu` and `mu` .Find the position (y) of central maxima.

A

zero

B

`(tD)/(d)`

C

`(-tD)/(d)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
At the central maxima `Deltax=0`
But upward shift `=((2mu-1)tD)/(d)` and
Downward shift `=((mu-1)2tD)/(d)`
So net shift `y=(tD)/(d)[2mu-1-2mu+2]impliesy=(tD)/(d)`
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ALLEN-WAVE OPTICS-Exercise 1 (Check your Grasp)
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