Question

A picture of a diffraction pattern. The first bright fringe on the left is labeled C, the first dark fringe is labeled B and the second bright fringe is labeled A. The bright fringe on the right is labeled D, the first dark band on the right is labeled E.
Which letters represent constructive interference in this diffraction pattern? Check all that apply.

A
B
C
D
E

Answer 1

Constructive interference occurs at the bright fringes. Those labeled A, C, and D are bright, so select: A, C, D.