For two beams of light traveling different distances in reaching a point, and to form maximum constructive interference at that point, the beams must travel paths that differ by a whole number of wavelengths.

Question

Quizplus · Accepted Answer

This is the principle of coherent and constructive interference in which the path difference between two waves must be a whole number of wavelengths for maximum constructive interference to occur.

For Two Beams of Light Traveling Different Distances in Reaching