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SE-9654
Zeeman Effect Experiment
20
012-14266B
Data Recording
NOTE: Three runs of data will be recorded, but only the first run of data, Run #1, will be used for measuring and analysis.
Run #1: Power at 0 A and then Power at 5 A - Polarizer at 90°,
1. Check that the polarizer is set to 90° and the power is set at 0 A. Click
Record
(
) at the bottom left corner of the
screen. After a few seconds, increase the power supply output to 3.00 A. After about 5 seconds click
Stop
(
).
•
This is Run #1. NOTE: The movie display toolbar will change its appearance to show that Run #1 was recorded.
Run #2: Rotate Polarizer from 90° to 0°, and then remove Polarizer - Power at 5 A
2. Check that the polarizer is still set at 90° and the power is at 5 A. Click
Record
. After a few seconds,
rotate the polarizer
to 0°
. Wait a few more seconds and then
remove the polarizer
. After a few more seconds, click
Stop
.
•
This is Run #2.
3. Replace the polarizer.
Run #3: Axial Magnetic Field, Rotate Polarizer through 90°- Power at 5 A
4. Remove the axial iron core plug (silver knob) from the electromagnet. (It just slides out, but is a tight fit so it is probably
easier to rotate it as you pull out). Rotate the electromagnet by 90° on its base so the axial hole is toward the camera.
5. Click the
Preview
button in the movie toolbar (
). If necessary, adjust the position of the electromagnet and/or mercury
lamp to give a bright image. You will probably need to open the aperture on the camera.
6. Click
Record
.
Slowly
rotate the polarizer through 90°
. Click
Stop
.
•
This is Run #3.
7. Decrease the power supply to 0 A. Turn the power supply off.
Measuring
1. Click the “Enter Video Analysis Mode” button at the left end of the movie toolbar to
expand the movie display toolbar.
•
The Control Palette at the bottom of the screen will change to “Playback Mode”.
2. Select “Run #1” from the menu in the Control Palette. Move the playback slider to the
beginning
(B = 0 at that point).
3. In the expanded movie display toolbar, click the “Calibration” button to turn off Calibration.
Enter Video Analysis Mode
Control Palette: Playback Mode
Playback Slider
Select “Run #1”
Playback Mode
Move Slider Here
Calibration button
Measurement Tool