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Green light of wavelength 5100 Å from a ...

Green light of wavelength 5100 Å from a narrow slit is incident on a double slit . If the overall separation of 10 fringes on a screen 200 cm away is 2 cm , find slit separation .

A

`5xx10^(-4)` m

B

`2.5xx10^(-2)` m

C

`2.5xx10^(-4)` m

D

`5xx10^(-2)` m

Text Solution

Verified by Experts

The correct Answer is:
A
`beta=(2)/(10)cm=2xx10^(-3)m`
As `beta=(lamdaD)/(d)`
`:. d=(lamdaD)/(beta)=(5000xx10^(-10)xx200xx10^(-2))/(2xx10^(-3))`
`=5xx10^(-4)m`
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