Section I: VARYING THE VARIABLES answers; a. Increase the amplitude to its maximum value using the light source amplitude control. Allow several seconds for the highsintensity light to travel to the screen. Record your observations. b. What difference if any does increasing the amplitude (A) have on the fringe pattern spacing (y)? y ~ A y ~ MA y does not depend on A c. Based on your conclusion, reducing the amplitude will cause the pattern to contract (decrease y). expand (increase y). remain the same. d.Reduce the amplitude to onefourth the maximum value. Doing so makes the amplitude less than it was in the initial setup. Describe the result and state whether or not it is consistent with your conclusion. e. Set the amplitude to full and leave it there for the remainder of the experiments. SlittoScreen Distance [L1 a. Increase the slit~to~screen distance by moving the barrier away from the screen. Set the barrier near 1300 run (second tick mark past zero). Record your observations. b. What difference if any does increasing the screen distance (L) have on the fringe pattern spacing (y)? y ~ L y ~ UL y does not depend on L c. Based on your conclusion, reducing the screen distance will cause the pattern to contract (decrease y). expand (increase y). remain the same