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Instruction Manual
and Experiment Guide
for the PASCO scientific
Model SE-9640 Franck-Hertz Tube
Model SE-9641 Franck-Hertz Oven
Model SE-9642 Franck-Hertz Control Unit
Franck-Hertz Experiment
S
E-9 641
Franck-Hertz Oven
(with tube)
Copyright 0 December
I
PASCO
101 01 Foothills Blvd.
5
1989
scientific
P .
0. B
619011
OX
C
SE-9640
Franck-Hertz Tube
SE-9642
Franck-Hertz Control
Unit
Roseville, CA 95661 USA
012-03498C
2/90
$5.00
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Summary of Contents for Pasco Scientific SE-9641
- Page 1 012-03498C Instruction Manual 2/90 and Experiment Guide for the PASCO scientific Model SE-9640 Franck-Hertz Tube Model SE-9641 Franck-Hertz Oven Model SE-9642 Franck-Hertz Control Unit Franck-Hertz Experiment SE-9640 Franck-Hertz Tube SE-9642 E-9 641 Franck-Hertz Control Franck-Hertz Oven Unit (with tube) Copyright 0 December $5.00...
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Page 3: Copyright Notice
Reproduction PASCO scientific. Responsibility for the return of equip- under any other circumstances, without the written consent ment for warranty repair belongs the customer. - Page 4 Should this product have be returned PASCO scientific, will not be damaged in shipment, observe the following for whatever reason, notify PASCO scientific by letter or rules: phone BEFORE returning the product. Upon notification, The carton must be strong enough for the item the return authorization and shipping instructions will be shipped.
- Page 5 12-03498C In troduction In 1914, J. Franck and G. Hertz performed a landmark experiment, providing important empirical support for Max Planck's quantum theory and for the model of the atom suggested by Niels Bohr. Through the study of collisions between electrons and gas molecules, Franck and Hertz Anode (Anode Current: demonstrated that energy is indeed quantized in atomic...
- Page 6 012-03498C regions in the tube where the electrons are colliding inelasti- If the accelerating voltage is too high, the electrons can still cally with the gas, raising the mercury atoms to their first gain excessive energy before striking Mercury atoms, even if level of excitation.
- Page 7 012-03498C Important: If an oscilloscope is Shielded cable with used in this setup, the ,BNCconnectors Voltmeters are not needed. the voltme- Voltmeter: 0-1 VDC ters are used, the (Voltage proportional oscilloscope is not I, , the anode current) needed. oscilloscope: y-input Voltmeter: 0-30 VDC Sample of oscilloscope display...
- Page 8 012-03498C C. Without the Control Unit 17. Increase the accelerating voltage, in increments about 0.5 volts. At each value of Va: record Va and the Remove the six thumbscrews that secure the front panel corresponding value for the anode current, I,. Repeat of the Franck-Hertz Oven.
- Page 9 012-03498C Analyzing the Experiment you did not use the oscilloscope to make your measurements, plot a graph plate current versus In performing the experiment (described in the previous on the x-axis. Locate the section for the various setups), you will have collected plate current minima and record the corresponding values of Va and corresponding values of To analyze this...
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Page 11: Technical Support
Technical Support Feed-Back Contacting Technical Support If you have any comments about this product or this Before you call the PASCO Technical Support staff manual please let us know. If you have any suggestions would be helpful to prepare the following information: on alternate experiments or find a problem in the manual If your problem is computer/software related, note: us.
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