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A laser beam having lamda=7000 Å and ap...

A laser beam having `lamda=7000 ` Å and aperture `d=10^(-2)m` is sent to the moon. What is the angular spread of the beam?

A

`7xx10^(-4)` radian

B

`(7xx10^(-4)xx10(pi)/(180))^(0)`

C

`7xx10^(-5)` radian

D

`(7)/(2)xx10^(-5)` radian

Text Solution

Verified by Experts

The correct Answer is:
C
`theta =(lamda)/(d)=(7000xx10^(-10))/(10^(-2))=7xx10^(-5)` radian.
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