In a modified YDSE the region between screen and slits is immersed in a liquid whose refractive index varies with time as μ λ = 
– 
until it reaches a steady state value 
. A glass plate of thickness 36 μ m and refractive index 
is introduced in front of one of the slits. The speed of the central maxima when it is at O is………… × 10 –3 m/s.
Text Solution
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CHECK THE SOLUTION.
Ans. 0003
Sol.
Δ x at P = (S 2 P – t) liquid + t glass – S 1 P liquid
Δ x = 
+ 
∴ Δ x = 0
∴ y = – 
= – 
Central maxima will be at O when y = 0 is at
T = 4 sec
find 
at T = 4 sec
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