User:Manuel Franco Jr./Notebook/Physics Lab 307/2008/10/01

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 * style="background-color: #EEE"|[[Image:Spectrum.jpg|250px]] Balmer Series Lab
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=The Balmer Series For Hydrogen and Deuterium=

Lab Partner: David

Objective
The objectives are: calibrate an optical spectrometer using the given mercury spectrum in the lab manual, investigate hydrogen and deuterium, compare them, and determine the Rydberg constant for hydrogen.

Equipment

 * Adam Hilger London Spectrometer. A Serial Number 12610 was found.
 * Power Supply, 5000V 10mA,(Model: Sp200 from Electro Technic products)
 * A Prism
 * A Hydrogen Tube from Cenco Scientific Company.
 * A Deuterium Tube from Cenco Scientific Company.
 * A Mercury Tube from Cenco Scientific Company.

Images for Experiment

Calibration
We first had to calibrate the spectrometer by using mercury (Hg) and the table spectral lines of Hg (Lab Manual: Section 4.3).

Hg Spectral Lines 404.7 nm (deep violet very hard to see!!) 435.8 nm violet skip (very weak blue-green) 546.1 nm green 577.0 nm yellow 579.0 nm yellow 690.75 nm red

The calibration was repeated as need. The colors were aligned using the cross hairs in the eyepiece. We moved the prism as need. Once we calibrated the spectrometer, we adjusted the slit to .7 mm. We adjusted the slit as needed, but we stayed within the bounds of .5 and 1 mm.

As we were calibrating Koch mention the us that the gears in the dial has what is called "slop." So when we calibrated the spectrometer, we calibrated it going counterclockwise. That means all the data measurements have to be taken the same way. If we were to take a data point clockwise, or opposite to direction we initially used to calibrate, our data would be off by about 1 nm. So all the data was gathered going in a counterclockwise direction on the dial.

Data
This is what you should see.

Hydrogen Measurements

Deuterium Measurements

Data Analysis
This is the in where I did all my analysis for hydrogen and deuterium.

As for the Rydberg constant, I found the constant in this word.

I used this equation to find the slope http://upload.wikimedia.org/math/5/a/0/5a05645dc256a0aca0ab1c9cf97b6525.png. And this is the actual measurement thereof http://upload.wikimedia.org/math/7/b/6/7b625152ea50ad187556f8d158b79aff.png.

Lab Summary
This is my lab summary.

Links

 * Physics307L
 * |Lab Notebook
 * Course Page
 * User Page


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