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Light of wavelength 600 nm is incident o...

Light of wavelength `600 nm` is incident on an aperture of size `2 mm`. Calculate the distance light can travel before its spread is more than the size of aperture.

A

12.13 m

B

6.67 m

C

3.33 m

D

2.19 m

Text Solution

Verified by Experts

The correct Answer is:
B
The distance upto which light can travel is
Fresnel distance, `z_(F)=(d^(2))/(lambda)=((2xx10^(-3))^(2))/(600 xx 10^(-9))=6.67m`
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