In Young's two-slit experiment, a beam of light from a slit reaches at a point on the screen one wavelength behind the wave from the other slit. What is observed on the screen at that point?
A) Dark fringe
B) An empty space
C) Bright-dark fringe
D) Dark-bright fringe
E) Bright fringe

Question

Quizplus · Accepted Answer

When one wave is one wavelength behind the other, they are in phase, resulting in constructive interference and a bright fringe.

In Young's Two-Slit Experiment, a Beam of Light from a Slit