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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 monochromatic blue value of light of the same intensity then....

A

fringe width will decrease

B

fringe width will increase.

C

fringe width will remain unchanged

D

fringes will becomes less intense

Text Solution

Verified by Experts

The correct Answer is:
A
`barX=(lambdaD)/(2d)`
`:. barX prop lambda and lambda_(b) gt lambda`
`:. barX_(b) gt barX_(y)`
`:.` Fringe width will decrease.
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