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In Young's double - slit experiment if y...

In Young's double - slit experiment if yellow light is replaced by blue light, the interference fringes become

A

wider

B

narrower

C

brighter

D

darker

Text Solution

Verified by Experts

The correct Answer is:
B
The wavelength `(lambda)` of yellow light is greater than blue light.
We know that,
Fring width `(beta)=(D lambda)/(d)`
`beta alpha lambda`
Here, `lambda` is decreases. Hence, the interference fringes become narrower.
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