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In YDSE separation between both slits is...

In YDSE separation between both slits is 0.6mm and separation between both the slitsand the creen is 80cm. Ist dark fringes is observed on the screen in front of are slits find wavelength of light.

A

`2.5 X 10^-4 `mm`

B

`2.6 X 10^-3 `mm`

C

`1.5 X 10^-4 `mm`

D

`6.5 X 10^-3 `mm`

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