First slide

In YDSE one of the slits is covered with a thin transparent sheet

Question

In Young's double slit experiment; monochromatic light is used to illuminate the two slits A and 8. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is normally placed in the path of the beam as shown in fig. (5), then

Moderate

A

the fringe will disappear
B

the fringe width will increase
C

the fringe width will decrease
D

there will be no change in fringe width

Solution

When a glass plate is introduced in one of the interfering beams of Young's double slit experiment, then there is a shifting of fringe pattern while fringe width remains the same.

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