# Physics307L:People/Phillips/Photoelectric

(Difference between revisions)
 Revision as of 19:21, 6 December 2008 (view source) (→Data & Results)← Previous diff Revision as of 19:23, 6 December 2008 (view source) (→Data & Results)Next diff → Line 9: Line 9: We came up with many different value for Planck's constant. We obtained two from the first order maxima from the light source, each being a separate run through the colors: We came up with many different value for Planck's constant. We obtained two from the first order maxima from the light source, each being a separate run through the colors: - $h^{1}_{first order} = (6.911 \pm .087) \cdot 10^{-34}~\mathrm{J}\cdot\mathrm{s} =$ + $h^{1}_{first order} = (6.911 \pm .087) \times 10^{-34}~\mathrm{J}\cdot\mathrm{s} = (4.319 \pm .054) \times 10^{-15}~\mathrm{eV}\cdot\mathrm{s}$

## Revision as of 19:23, 6 December 2008

### Photoelectric Effect (Planck's Constant) Summary

#### Data & Results

The notebook entry for this lab is located here. We generated two Excel files for this lab as well: Planck.xlsx and First Order.xlsx.

We measured two different things in this lab related to the photoelectric effect, but only one of these has an accepted value - Planck's Constant. This value is

$h_{acc} = 6.626\,068\,96(33) \times 10^{-34}~\mathrm{J}\cdot\mathrm{s} = 4.135\,667\,33(10) \times 10^{-15}~\mathrm{eV}\cdot\mathrm{s}$

We came up with many different value for Planck's constant. We obtained two from the first order maxima from the light source, each being a separate run through the colors:

$h^{1}_{first order} = (6.911 \pm .087) \times 10^{-34}~\mathrm{J}\cdot\mathrm{s} = (4.319 \pm .054) \times 10^{-15}~\mathrm{eV}\cdot\mathrm{s}$