Wave Optics - Result Question 29
31. 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)
(b)
(c)
(d)
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Answer:
Correct Answer: 31. (b)
Solution:
- (b) For first minima at
So phase difference,
