In the interference pattern obtained in ...

In the interference pattern obtained in a biprism experiment, 5th order bright fringe is obtained at a point on the screen, when monochromatic light of wavelength 6000 Å is used. What is the order of the bright fringe produced at the samme point, if the light of wavelength 5000 Å is used?

`n=3`

`n=4`

`n=6`

`n=10`

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The correct Answer is:

`n_(1)lamda_(1)=n_(2)lamda_(2)" "therefore 5xx6000=n_(2)xx5000" "therefore n_(2)=6`

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