Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum destructive interference is to occur at point P, the two beams
Must travel paths that differ by

Question

Quizplus · Accepted Answer

For maximum destructive interference to occur, the path difference between the two beams must be an odd number of half-wavelengths. This causes the waves to be out of phase by 180 degrees, leading to cancellation.

Two Beams of Coherent Light Start Out at the Same