If a wave from one slit of a Young's double slit experiment arrives at a point on the screen one-half wavelength behind the wave from the other slit, which is observed at that point?
A)bright fringe
B)dark fringe
C)gray fringe
D)multi-colored fringe

Question

Quizplus · Accepted Answer

A dark fringe is observed because the waves are out of phase by half a wavelength, resulting in destructive interference.

If a Wave from One Slit of a Young's Double