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 wavelength from the mid point of the slit is
A
radian
B
radian C
radian
D
radian
Text Solution
Verified by ExpertsThe correct answer is:
D
For 
minima
Path difference 
From mid point, path difference 
∴ Phase difference 
radian
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