Physics307L F09:People/Gibson/Notebook/071203

Speed of light w/ Matt, Zane and Koch

 * Triggering on channel 2 (TAC), 100 mV rising.
 * PMT maximized about 50 cm away from LED, value = 3.30 +/-0.02
 * TAC is on 50 ns scale
 * averaging 128
 * 500 mV / division channel 1
 * 200 mV / division channel 2

stick reading (cm) TAC (V)  PMT notes (if any) 9      1.47 +/- 0.01 14      1.43 +/- 0.01  19      1.40 +/- 0.01 24      1.36 +/- 0.01 29      1.33 +/- 0.01 36      1.28 +/- 0.01 39      1.26 +/- 0.01 44      1.22 +/- 0.01 49      1.18 +/- 0.01 54      1.14 +/- 0.01 59      1.10 +/- 0.01

59 cm meter stick 3.30 V PMT 1.09 V TAC

9 cm meter stick 3.18 V PMT 1.47 V TAC

59 cm meter stick 3.18 V PMT 1.1 V TAC