Physics307L F09:People/Mondragon/Notebook/071010

second week

Plank's Constant

Plank's constant experiment

Equipment and setup

battery outputs +8.70 -8.69

dry run, no filters

First Group:

• First blue 2.075V
• Second blue 1.721V
• Third blue 1.505V
• Green/yellow 1.025V
• Orange/yellow 1.062

Second Group:

• First blue 2.065V
• Second blue 1.732V
• Third blue 1.570V
• Green/yellow 1.754V
• Orange/yellow 1.587V

part a experimenting with the variable filter

First Group

1Blue-

• 100%-2.085V-3.5s
• 80%-2.0785-2.5s
• 60-2.0785-4.5s
• 40-2.0785-3.5s
• 20-2.0785-3.5s

suggestion for Improvement

timing is difficult, What about an o-scope? Lorenzo suggested using an oscope for more accurate timing. There are just too many ways for timing by stopwatch can go wrong.