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In Young,s double slit experimentm, 60 f...

In Young,s double slit experimentm, 60 fringes are observed in the central view zone with light of wavelength `4000Å`, The number of fringes that will be observed in the same view zone with the light of wavelength `6000Å`, is

A

40

B

90

C

60

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`omega = (lambdaD)/d or omega prop lambda `
` omega` will increase `6000/4000`
or 1.5 times.
Hence, number of fringes in same distance will
decrease 1.5 times.
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