# User:Nathan Giannini/Notebook/Physics 307L/101018

### From OpenWetWare

My partner is Richard T. Meyers

## Contents |

## Safety

- Beware of Electric Shock
- Do Not mess with PMT

## Procedure

The Procedure can be found here and the analysis can be found here

## My Experience in the Lab

This is a simple lab that required me to start a program and then let it run to completion. We saved each of our our trials, for varying time intervals, and then uploaded them to Google Docs. All of the analysis can be easily done by creating histograms for each trial we took and then creating a chart that contains a Poisson Distribution Overlay. We also became aware of a differing use for our amp. The two choices were "Pre-Amp" and "Amp-In". We took trials with both so that we could determine which one was Poisson Distributed.

## Data

^{SJK 19:51, 21 December 2010 (EST)}The Red Line is the Poisson Distribution. The charts can be viewed by clicking either 'Chart 1' or 'Chart 2'.

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# Functions Used in Google Docs

- COUNTIF -> occurences
- MAX -> Max
- MIN -> Min
- AVERAGE -> Mean
- STDEV -> Deviation
- And the Poisson Distribution Function

# Analysis

^{SJK 19:52, 21 December 2010 (EST)}The Histograms for "Pre-Amp" are normally distributed, not Poisson Distributed, and are, therefore, neglected in this analysis. I will also neglect 200ms since there appears to have been some sort of systematic error there.

## *S**q**r**t*(*M**e**a**n*)

These are kept without correct sig. figs.

- 800ms - 4.900674341
- 400ms - 3.464383639
- 100ms - 1.748891735
- 80ms - 1.581833841
- 40ms - 1.112394085
- 20ms - 0.7864260932
- 10ms - 0.5476779163

## Deviation

These are copied out of the docs above

- 800ms - 4.9339446
- 400ms - 3.4119272
- 100ms - 1.7646143
- 80ms - 1.6206361
- 40ms - 1.1476129
- 20ms - 0.7775635
- 10ms - 0.5459483

## Difference

These are the values given to me by my caluculator

- 800ms - 0.03327025865
- 400ms - 0.05245643926
- 100ms - 0.01572256521
- 80ms - 0.03880225917
- 40ms - 0.03521881515
- 20ms - 0.0088625932
- 10ms - 0.0017296163

The differences become more like those of a poisson distribution as the time interval decreases. This leads me to suspect that if we used an even smaller interval we would achieve an even greater similarity to a normal poisson distribution. I also notice that for the 100ms, 400ms, and 800ms the poisson distribution becomes like a gaussian, and is most likely no longer poisson distributed, but normally distributed.

^{SJK 20:06, 21 December 2010 (EST)}# Thanks

- To Dr. Steve Koch for helping me understand and evaluate my experiment.
- To Katie for helping keep boredom away while we were collecting our data.
- To Rickard T. Meyers for helping figuring out the steps we needed to analyze our data.