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The sources of monochromatic and chohere...

The sources of monochromatic and choherent light beam should be narrow to produce stable interference, because narrow sources can have

A

approximately equal intesities

B

approximately equal and small intensities

C

approximately equal and long intensities

D

small number of point sources to maintain coherency

Text Solution

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The correct Answer is:
D
Narrow sources can have small number of point sources, so that coherency can be maintained .
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