NEET2020Physics-Optics
NEET 2020 Physics Interference MCQ Question
Type: MCQ-conceptual-Medium-Class 12
In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
A
four times
B
one-fourth
C
double
D
half
Correct Answer
Option A
Detailed Explanation
Fringe width is directly proportional to the distance of the screen and inversely proportional to the separation between sources. Halving the separation and doubling the distance makes the fringe width four times.
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