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A light of wavelength 4000 overset@A for...

A light of wavelength `4000 overset@A` forms third bright fringe at some point on the screen in Young’s double slit experiment. Find the wavelength of light which will form second bright fringe at the same point.

A

`6000 overset@A`

B

`4000 overset@A`

C

`3000 overset@A`

D

`4500 overset@A`.

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