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Light of wavelength 6328 Å is incident n...

Light of wavelength `6328 Å` is incident normally on a slit having a width of `0.2mm` The width of the central maximum on a screen 9m away will be nearly

A

`0.36^(@)`

B

`0.18^(@)`

C

`0.72^(@)`

D

`0.09^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Angular fringe width `theta=lambda/d`
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