A parallel beam of monochromatic light o...

A parallel beam of monochromatic light of wavelength `5000Å` is incident normally on a single narrow slit of width `0.001mm`. The light is focused by a convex lens on a screen placed on the focal plane. The first minimum will be formed for the angle of diffraction equal to

A

`0^@`

B

`15^@`

C

`30^@`

D

`50^@`

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The correct Answer is:

C

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