An optical engineer needs to ensure that the bright fringes from a double-slit are 15.7 mm apart on a detector that is 1.70 m from the slits.If the slits are illuminated with 633 nm light,how far apart should the slits be?
A)68.5 μm
B)74.0 μm
C)79.5 μm
D)63.0 μm

Question

Quizplus · Accepted Answer

Using the formula for fringe spacing in a double-slit experiment, $ \Delta y = \frac{\lambda L}{d} $, where $ \Delta y = 15.7 $ mm, $ \lambda = 633 $ nm, and $ L = 1.70 $ m, solving for $ d $ gives approximately 68.5 μm.

An Optical Engineer Needs to Ensure That the Bright Fringes