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The path differece between the two inden...

The path differece between the two indentical waves arriving at a point is `85.5 lambda`. If path difference is `42.5 mu m` then wavelenght of light used is

A

`5971Å`

B

`4971Å`

C

`3971Å`

D

`6971Å`

Text Solution

Verified by Experts

The correct Answer is:
B
`85.5lamda=42.5xx10^(-6)`
`:.lamda=(42.5xx10^(-6))/(85.5)=4971Å`
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