Question
On the first minimum adjacent to the central maximum of a single slit diffraction pattern, the phase difference between the Huygens wavelet from the edge of the slit and the wavelet from the midpoint of the slit is
- π/4 radian
- π/2 radian
- π radian
- π/8 radian
Solution
C.
π radianFor the first minima at P, a sin θ = nλ
where , N = 1
