Name:_
PHYSICS 250
May 4, 1999
Final Exam - Solutions
Instructions: Work all 13 problems. You may use a calculator and two pages of notes you may
have prepared. There are problems of varying length and difculty. If you have trouble with one
problem, go on
Physics 250
Practice Exam II
E 2
E 1
Te
E 2 = 120 keV
Ee
Te = 40 keV
1. In a Compton scattering event, the scattered photon has an energy of 120 keV and the
recoiling electron has an energy of 40 keV. Find (a) the wavelength of the incident photon,
(b) th
4/14/000
Solutions to Practice Problems for Exam 3
1. (a)
2
nx 2
ny 2
nz 2 2
h
E n x n y nz = - - + - + -
Lz
L y
8m L x
2
h
2
2
2
= - [ n x + n y + n z ]
2
8mL
nx
ny
nz
1
1
1
2
1
1
1
2
1
1
1
2
6 E0
3
2
1
2
2
2
1
1
2
2
9 E0
3
3
1
1
1
3
1
1
1
3
11 E 0
3