Now consider a wave which is paired with seven other waves into seven pairs. The two waves in each pairing are identical, except that one of them is shifted relative to the other in the pair by the distance shown:
%u2212(1/2)%u03BB -(1/2) \lambda
2%u03BB 2 \lambda
%u22125%u03BB -5 \lambda
(3/2)%u03BB (3/2) \lambda
0 0
(17/2)%u03BB (17/2) \lambda
(6/2)%u03BB (6/2) \lambda
Identify which of the seven pairs will interfere constructively and which will interfere destructively. Each letter represents a pair of waves.
Enter the letters of the pairs that correspond to constructive interference in alphabetical order and the letters of the pairs that correspond to pairs that interfere destructively in alphabetical order separated by a comma. For example if pairs A, B and D interfere constructively and pairs C and F interfere destructively enter ABD, CF.