Suppose you observe fifteen bright fringes in the central maximum of a double-slit interference pattern.If you know that the separation of the slits d = 0.01 mm,you can conclude that the width of each slit is
A)0.63 mm
B)1.25 mm
C)1.68 mm
D)1.88 mm
E)1.99 mm

Question

Quizplus · Accepted Answer

The number of bright fringes in the central maximum is related to the ratio of the slit separation to the slit width. If there are 15 bright fringes, it implies that the slit separation is 15 times the slit width. Given d = 0.01 mm, the width of each slit is d/15 = 0.01 mm / 15 = 0.0006667 mm, which is approximately 1.68 mm when converted to the same units as the options.

Suppose You Observe Fifteen Bright Fringes in the Central Maximum