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In a Young's double-slit experiment the ...

In a Young's double-slit experiment the fringe width is `0.2mm`. If the wavelength of light used is increased by 10% and the separation between the slits if also increased by 10%, the fringe width will be

A

0.20 mm

B

0.401 mm

C

0.242 mm

D

0.165 mm

Text Solution

Verified by Experts

The correct Answer is:
A
`beta=(Dlamda)/d`
and `beta.=(Dxx1.1lamda)/(1.1d)=(Dlamda)/d=beta=0.2mm`.
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