Wave OpticsHard
Question
In YDSE, two thin transparent sheets of thickness t1 and t2 having refractive indices μ1 and μ2 placed infront of slit S1 and S2. If μ1t1 = μ2t2 and t2 > t1, the central fringe will :-
Options
A.Shift upward
B.Shift downward
C.Will not shift at all
D.Become coloured
Solution
∴ μ1t1 = μ2t2 or 
∵ t2 > t1 given
∴ μ1 > μ2
(Shift upwards)
∵ t2 > t1 given
∴ μ1 > μ2
(Shift upwards)
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