# Physics307L:People/Phillips/Photoelectric

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<math>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}</math> | <math>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}</math> | ||

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+ | <math>h^{2}_{first order} = (6.978 \pm .059) \times 10^{-34}~\mathrm{J}\cdot\mathrm{s} = (4.361 \pm .037) \times 10^{-15}~\mathrm{eV}\cdot\mathrm{s}</math> | ||

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+ | each with percent errors from the accepted value of | ||

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+ | <math>\% error^{1}_{first order} = 4.30\%</math> | ||

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+ | <math>\% error^{2}_{first order} = 5.32\%</math> | ||

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+ | Along with these first order values, we also ran through the experiment using only the second order maxima, obtaining different values for Planck's constant: |

## Revision as of 20:29, 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

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:

each with percent errors from the accepted value of

Along with these first order values, we also ran through the experiment using only the second order maxima, obtaining different values for Planck's constant: