The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness 
and refractive index 
is put in front of one of the slits, the central maximum gets shifted by a distance equal to 
fringe widths. If the wavelength of light used is 
, 
will be:
Text Solution
Verified by Experts-
Correct option should be (Bonus)
Path difference at central maxima 
, whole pattern will shift by same amount which will be given by
, according to eh question 
No option is matching, therefore question should be award bonus.
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