Question

At the first minimum adjacent to the central maximum of a
single-slit diffraction pattern, the phase difference between
the Huygen's wavelet from the edge of the slit and the
wavelet from the midpoint of the slit is : [2015 RS]
(a) π/2 radian
(b) π radian
(c) π/8 radian
(d) π/4 radian

Answer 1

The answer is

(b) π radian

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