Question

In a setup like that in Figure 27.7, a wavelength of 625 nm is used in a Young’s double-slit experiment. The separation between the slits is d = 1.4 × 10^-5 m. The total width of the screen is 0.20 m. In one version of the setup, the separation between the double slit and the screen is L_A = 0.49 m, whereas in another version it is L_B = 0.31 m. On one side of the central bright fringe, how many bright fringes lie on the screen in the two versions of the setup? Do not include the central bright fringe in your counting.

m = 3 (Bright fringe) e d m = 0 (Bright fringe) o y -m = 3 (Bright fringe) -L- Figure 27.7

Answer 1

In one version LA=0.49m dsmo amy m= d (LA) maa 1.4x165x0.2 2-x0.49 6254154 74 m b In second Version d Sud md luxio 5.0.2 my= 6257159 2x0.31 mB = 7