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If yellow light emitted by sodium lamp i...

If yellow light emitted by sodium lamp in Young's double - slit - experiment is replaced by a monochromatic blue light of the same intensity

A

fringe width will decreases

B

fringe width will increases

C

fringe width will remain unchanged

D

fringe will becomes less intense

Text Solution

Verified by Experts

The correct Answer is:
A
We know that `beta=(lambdaD)/d & lambda_(yellow) gt lambda_(blue)`
`rArr` as `lambda` decreases, so `beta` also decreases.
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