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A parallel beam of wavelength lambda=450...

A parallel beam of wavelength `lambda=450xx10^9m` passes through a long slit of width `2xx10^-4m`. The angular divergence for which most of light is diffracted is

A

`(2pi)/(3)`

B

`(5pi)/(4)`

C

`(3pi)/(4)`

D

`(pi)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`a sin theta = n lambda , theta = (lambda)/(a) (n pi)/(180)rad`
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