Which of the following statements correctly distinguish single-slit diffraction from ideal two-source interference?

Select all that apply

• Option A

  Interference fringes can have nearly equal widths, whereas the central diffraction maximum is wider than the secondary maxima

• Option B

  For equal coherent sources, interference maxima can have equal intensities, whereas diffraction secondary maxima become progressively weaker

• Option C

  Diffraction requires two separate coherent sources

• Option D

  Diffraction can be understood as interference of secondary wavelets from different parts of the same aperture