One of the two slits in a Young's experiment is painted over so that it transmits only one-half the intensity of the other slit.As a result:
A)the fringe system disappears
B)the bright fringes get brighter and the dark ones get darker
C)the fringes just get dimmer
D)the dark fringes just get brighter
E)the dark fringes get brighter and the bright ones get darker

Question

Quizplus · Accepted Answer

When one of the slits is painted over, the intensity of the light passing through that slit is reduced. This means that the interference pattern will be affected, and in particular, the intensity of the fringes will decrease. However, since only one slit is affected, the pattern of bright and dark fringes will still be observed. The dark fringes will get brighter because the reduced intensity through one slit will still contribute to the destructive interference at those points, resulting in a brighter dark fringe. Similarly, the bright fringes will get darker because the reduced intensity through one slit will still contribute to the constructive interference at those points, resulting in a darker bright fringe.

One of the Two Slits in a Young's Experiment Is