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Yellow light emitted by sodium lamp in Y...

Yellow light emitted by sodium lamp in Young's double slit experiment is replaced by monochromatic blue light of the same intensity:

A

Fringe width will decrease

B

Fringe width will increase

C

Fringe width will remain unchanged

D

Fringes will become less intense

Text Solution

Verified by Experts

The correct Answer is:
A
we know that `beta = (lambda D)/(d)` & `lambda_("yellow") gt lambda_("blue")`
`rArr` As `lambda` decreases, so `beta` also decreases.
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