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A parallel beam of light 500 nm is incid...

A parallel beam of light 500 nm is incident at an angle `30^(@)` with the normal to the slit plane in a young's double slit experiment. The intensity due to each slit is Io. Point O is equidistant from `S_(1)` and `S_(2)`. The distance between slits is 1mm.

A

the intensity at O is 4Io

B

the intensity at O is zero.

C

the intensity at a point on the screen 4mm from O is 4Io

D

the intensity at a point on the screen 4mm from O is zero.

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The correct Answer is:
A
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