When a thin transparent plate of thickness t and refractive index μ is placed in the path of one of the two interfering waves of light, then the path difference changes by
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a
(μ+1)t
b
( μ– 1)t
c
(μ+1)t
d
(μ−1)t
answer is B.
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Detailed Solution
Path difference when film is introduced = ( μ– 1)t.