Practice Problem 26.1 Lef’s use a two-slit interference experiment to determine the unknown SET UP AND SOLVE Part (a): With wa 3 0.200 mm apart and a screen at a distance of 1.00m, the third bright band out trom the central bright band is found to be 9 49 am from the center of e creen. (a) What is the wavelength of the light? (b) How far apart would the slits have to be so that the fourth minimum (dark band) wouild occur at 633 × 10 “m-633am 9.40 mm from the center of the screen? Part (bj: For desinuctive interlenence, and therefore a minimum 0 gives the first minmum mI the second m2 the hrd, and m-3 the fourh. Thus, -2.33 × 10-4 0.233mm REFLECT This Part A Practice Problem: Express your answer to three significant figures and include appropriate units Value Units