In Young's double-slit experiment , we g...

In Young's double-slit experiment , we get 60 fringes in the field of view if we use light of wavelength `4000 Å`. The number of fringes we will get in the same field of view if we use light of wavelength `6000 Å` is

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The correct Answer is:

`n_(1)lambda_(1)=n_(2)lambda_(2)`
`60xx4000=n_(2)xx6000`
`n_(2)=40`

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