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At the first minimum adjacent to the cen...

At the first minimum adjacent to the central maximum ofa single-slit diffraction pattern the phase difference between the Huygen’s wavelet from the edge of the slit and the wavelet from the mid point of slit is.

A

`mu=pi/8`

B

`mu=pi/4`

C

`mu=pi/2`

D

`pi`

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