One slit of a double slit experiment is covered by a thin glass plate of refractive index 1.4, and the other by a thin glass plate of the refractive index 1.7. The point on the screen where the central maximum fall before the glass plate was inserted, is now occupied by what had been the fifth bright fringe was seen before. Assume the plate have the same thickness 
and wavelength of light 480 nm. Then, the value of 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Five fringes have to be shifted.
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