Photoelectric Effect Apparatus
Model No. AP-8209
23
®
Appendix C: Technical Support, Copyright, Warranty
For assistance with the h/e Photoelectric Effect Apparatus (AP-8209) or any other PASCO
products, contact PASCO as follows:
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: (916) 786-3800
FAX: (916) 786-7565
Web: www.pasco.com
Email: [email protected]
Copyright Notice
The PASCO scientific 012-10626B
Photoelectric Effect Apparatus
manual
is copyrighted and all
rights reserved. However, permission is granted to non-profit educational institutions for
reproduction of any part of the 012-10626B
Photoelectric Effect Apparatus
manual, providing the
reproductions are used only for their laboratories and are not sold for profit. Reproduction under
any other circumstances, without the written consent of PASCO scientific, is prohibited.
Warranty
For a description of the product warranty, see the PASCO catalog.
Appendix D: Teacher’s Notes
Sample Data
Experiment 1: Measuring and Calculating
Planck’s Constant
The illustration shows typical data for
Stopping Potential versus Frequency with the
4 mm diameter aperture.
The slope value of 0.406 V/10
14
Hz gives a
value for Planck’s constant of
h
= 6.504 x 10
-34
J s. This value has a 1.8%
difference with the accepted value
h
0
= 6.626 x 10
-34
J s.
The following table shows typical data for Stopping Voltage of Spectral Lines for the 4 mm
diameter aperture.
Stopping Potential vs. Frequency