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In a Young's double slit experiment the ...

In a Young's double slit experiment the slit is illuminated by a source having two wavelength of `400 nm` and `600 nm`. If distance between slits, `d=1mm`, and distance between the plane of the slit and screen, `D=10 m` then the samllest distance from the central maximum where is complete darkness in :

A

`2mm`

B

`3mm`

C

`12 mm`

D

there is no such point

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The correct Answer is:
D
N//a
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