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A small aperture is illuminated with a p...

A small aperture is illuminated with a parallel beam of `lambda = 628 nm`. The emergent beam has an anglur divergence of `2^(@)`. The size of the aperture is

A

`9 mu `m

B

`18 mu m `

C

`27 mu m `

D

`36 mu m `

Text Solution

Verified by Experts

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