At the Second Minimum Adjacent to the Central Maximum of a Single-Slit

Multiple Choice

At the second minimum adjacent to the central maximum of a single-slit diffraction pattern the Huygens wavelet from the top of the slit is 180 ° out of phase with the wavelet from:

A) a point one-fourth of the slit width from the top
B) the midpoint of the slit
C) a point one-fourth of the slit width from the bottom of the slit
D) the bottom of the slit
E) none of these