PHY3063 Spring 2007
Problem Set 5
Department of Physics
Page 1 of 2
PHY 3063 Problem Set #5
Due Thursday February 22 (in class)
(Total Points = 60, Late homework = 50%)
Reading:
Finish reading Tipler & Llewellyn Chapter 3 and start reading Chapter 4.
Problem 1 (5 points):
A metal has a work function of
3.0
electron volts.
What is the maximum
kinetic energy (
in eV
) of a photoelectron emitted by the surface of the metal if light with a
wavelength of
500 nm
falls on the surface?
Problem 2 (15 points):
θ
= 90
o
Photon: E
1
, p
1
Photon: E
0
, p
0
Before
Electron at Rest
Electron: E
2
, p
2
After
Ψ
A photon with energy
E
0
strikes an electron at rest in a Compton scattering and exits at an angle
θ
= 90
o
relative to its incoming direction, where
m
e
c
2
= 0.511 MeV
.
Part A (5 points):
If
E
0
= 2m
e
c
2
, what is the energy of the outgoing photon (
in MeV
)?
Part B (5 points):
If
E
0
= 2m
e
c
2
, what is the recoil kinetic energy of the electron (
in MeV
)?
Part C (5 points):
If
E
0
= 2m
e
c
2
, what is the recoil angle
Ψ
of the electron (
in degrees
)?
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- Spring '07
- Field
- Physics, Atom, Electron, Work, ground state, helium ion
-
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