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Light of wavelength lambda from a point ...

Light of wavelength `lambda` from a point source falls on a small circular rings around a central bright spot are formed on a screen beyond the obstacle The distance beetween the screen and obstacle is D. Then, the condition for the formation of rings, is

A

`sqrt(lambda)approxd/(4D)`

B

`lambdaapproxd^(2)/(4D)`

C

`d approx lambda^(2)/D`

D

`lambdaapproxD/4`

Text Solution

Verified by Experts

The correct Answer is:
B
Here the condition for the formation of rings is
`lambda approx d^(2)/(4D)`
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