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A lens of focal length f gives diffracti...

A lens of focal length f gives diffraction pattern of Fraunhoffer type of a slit having width a. If wavelength of light is `lambda`, the distance of first dark band and next bright band from axis is given by

A

`(a)/(lambda)f`

B

`(lambda)/(a)f`

C

`(lambda)/(af)`

D

`a lambda f`

Text Solution

Verified by Experts

The correct Answer is:
B
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