In a Young's double-slit experiment, the slit separation is doubled.This results in:
A)an increase in fringe intensity
B)a decrease in fringe intensity
C)a halving of the wavelength
D)a halving of the fringe spacing
E)a doubling of the fringe spacing

Question

Quizplus · Accepted Answer

Doubling the slit separation in a Young's double-slit experiment results in a halving of the fringe spacing. This is because the fringe spacing formula is given by $ \lambda D / d $, where $ \lambda $ is the wavelength of light, $ D $ is the distance to the screen, and $ d $ is the slit separation. Doubling $ d $ therefore halves the fringe spacing.

In a Young's Double-Slit Experiment, the Slit Separation Is Doubled