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If the refracting angle of a Fresnel Bip...

If the refracting angle of a Fresnel Biprism is increased, then

A

the interference ringes will disappear

B

fringes will not be affected

C

the fringe width is increased

D

the fringe width is decreased

Text Solution

Verified by Experts

The correct Answer is:
D
`d=2a(n-1)alpha`
If `alpha` is increased, then d increased and
`because X=(lamdaD)/(d)`, X is decreased
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