In a Young's double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m, find the spacing between the first-order and second-order bright fringes for light with wavelength of 600 nm.
A)1.5 cm
B)3.0 cm
C)4.5 cm
D)6.0 cm
E)9.0 cm

Question

Quizplus · Accepted Answer

The fringe spacing (Δy) is given by the formula Δy = λL/d, where λ is the wavelength, L is the distance to the screen, and d is the slit separation. For the first-order fringe, Δy1 = (600 x 10^-9 m)(2.5 m)/(0.050 x 10^-3 m) = 0.03 m or 3.0 cm. The spacing between the first-order and second-order fringes is also 3.0 cm.

In a Young's Double Slit Experiment, If the Separation Between