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Question: Angular fringe width obtained during YDSE in air is 0.20. If whole apparatus is emerged in water(m =...

Angular fringe width obtained during YDSE in air is 0.20. If whole apparatus is emerged in water(m = 4/3), then angular width of fringes will become –

A

0.110

B

0.300

C

0.220

D

0.150

Answer

0.150

Explanation

Solution

Fringe width in water = Fringe6muwidth6muin6muairμwater\frac{Fringe\mspace{6mu} width\mspace{6mu} in\mspace{6mu} air}{\mu_{water}}

= 0.204/3\frac{0.20}{4/3} = 0.150