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Phys320 – Spring 2004 (Baski)
Quiz #2:
Particle/Wave Duality – Part 1
February 11, 2004
Name:
SOLUTIONS
Complete both of the following problems.
Show all of your work for full credit.
( 29 ( 29
Useful Formula:
1
co
s
(0.00243nm
)1
cos
Compton
l
l
qq
∆
=

=
Problem 1
:
Photoelectric effect
Find the work function for an unknown metal if an incoming 3.0eV photon ejects a photoelectron with
1.5 eV kinetic energy. Given this work function, find the stopping potential for an electron ejected using light
with a 620 nm wavelength.
(photon energy
)
(electron kinetic energy
)
3.0 e
V
1.5e
V
1.5eV
1240 eV nm
1.5 eV = 0.5 eV.
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This homework help was uploaded on 04/22/2008 for the course PHYS 320 taught by Professor Baski during the Spring '04 term at VCU.
 Spring '04
 Baski
 Physics, Work

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