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In Young's double slit experiment, 62 fr...

In Young's double slit experiment, 62 fringes are seen in visible region for sodium light of wavelength `5893Å`. If violet light of wavelength `4358Å`, is used in place of sodium light, then number of fringes seen will be

A

54

B

64

C

74

D

84

Text Solution

Verified by Experts

The correct Answer is:
D
Given, `lambda_(1)=5893"Å", n_(1)=62, lambda_(2)=4358` Å
As field view of both the wavelengths is same, hence
`n_(1)beta_(1)=n_(2)beta_(2)`
as `n_(1)((Dlambda_(1))/(d))=n_(2)((D lambda_(2))/(d))`
`rArr n_(2)=n_(2)((lambda_(1))/(lambda_(2)))=62xx(5893)/(4358)=84`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-INTERFERENCE AND DIFFRACTION OF LIGHT -MHT CET Corner
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