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Light of wavelength 6328 Å is incident n...

Light of wavelength `6328 Å` is incident normally on a slit of width 0.2 mm. Angular width of the central maximum on the screen will be :

A

`0.9^@`

B

`0.18^@`

C

`0.54^@`

D

`0.36^@`

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The correct Answer is:
D
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