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In Young's double slit experiment , ligh...

In Young's double slit experiment , light waves of `lambda = 5.4 xx 10^(2)` nm and `lambda = 6.85 xx 10^(1)` nm are used in turn , keeping the same geometry of the set up . Calculate the ratio of the fringe widths in the two cases .

A

1.3

B

4.3

C

7.9

D

9.5

Text Solution

Verified by Experts

The correct Answer is:
C
Fringe width, `beta=(D lambda)/(d)`
` :. (beta_(1))/(beta_(2))=(lambda_(1))/(lambda_(2))=(5.4xx10^(2))/(68.5xx10^(1))=7.9`
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