Durham Technical Community College Lab 12 - Interference & Diffraction in table below. a. Measure the positions of the minima from the central position on the screen. Record b. From the positions of minima for each of the various orders m = 1,2,3..., determine the width of the slit, a. Distance L (cm): m Xcenter Xm (cm) 40 0 . 3 8. 44 x10 2 0. 65 7. 79 X10 Wavelength of Laser: 3 7. 59 X 10 633 nm 4 1.3 7. 79 x10' 5 10 75 7. 24x10 Average of a: 7.77x 10' 3. Now change the distance from the slit to the screen and repeat your measurements. Distance L (cm): m Xcenter Xm (cm) a 0.5 60 7.59 xlots 2 7.59 x 10) Wavelength of Laser: 3 1.5 17 . 59 * 10 ] 63 3 P .D 4 2 .1 17. 24 x 16 5 265 7.7 7X 10+5 Average of a: 7. 44 x 10 What do you notice about the width of the center peak? What happens to the space between the minimums? What is the percent error between the two slit width values, a (assuming first one is the theoretical)? Does the distance from the slit to the screen affect the value for the slit width? asaal to diggolaveW Procedure: Double Slit 4. Replace the single slit by double slit. a. Measure all maxima and minima within the central band from the central position on the screen