Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In a Young's double slit experiment set up, the two slits are kept 
apart and screen is placed at 1 m from slits. If a thin transparent sheet of thickness 
is introduced in front of one of the slits then centre bring fringe shifts by 20 mm on the screen. The refractive index of transparent sheet is given by 
, where 
is 
.
Text Solution
Verified by ExpertsThe correct answer is:
14
(14) 
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