In the two-slit experiment, for the condition of dark fringes, the value of m = +4 corresponds to a path difference of
A) (1/2)λ
B) (3/2)λ
C) (5/2)λ
D) (7/2)λ
E) (9/2)λ

Question

Quizplus · Accepted Answer

In the two-slit experiment, dark fringes occur when the path difference is an odd multiple of (1/2)λ. For m = +4, the path difference is (2m + 1)/2 λ = (2*4 + 1)/2 λ = (9/2)λ.

In the Two-Slit Experiment, for the Condition of Dark Fringes