In Young's double slit experiment, a glass plate is placed before… - Vidyadip

MCQ

In Young's double slit experiment, a glass plate is placed before a slit which absorbs half the intensity of light. Under this case

A
The brightness of fringes decreases
B
The fringe width decreases
C
No fringes will be observed
✓
The bright fringes become fainter and the dark fringes have finite light intensity

✓

Answer

Correct option: D.

The bright fringes become fainter and the dark fringes have finite light intensity

d
(d) As the intensity of one of the slit is reduced to half the intensity. The average fringe width is equal to the sum of the incident intensities. As the incident intensity of one of the slit is cut to half the bright fringes become fainter and dark fringes have finite light intensity.

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