Bigger amplitude (high probability) in
regions I and III where Kinetic Energy
is smaller (bigger chance of finding
n = 6, there must be 5 internal nodes then.
In region II where k = kII is bigger, the
distance between nodes is smaller
Problem 1 [26 points]
A high speed train is moving at a velocity of 0.6 c relative to a reference frame 8, which
is xed on the tracks. At some instant in time, as measured in the reference frame 8 of
the train, two children standing on the same side of th
. B A ' I Ouéc
}_ 0,37 1 1 of4
I. (20%) Two xed nozzles A and B on the ground, 0.8 m apart, spray paintmarks
simultaneously (as measured by the ground observer 0) onto a long rod which passes by
as shown in the gure at a relativistic speed '0 = 0.60.
Gener al Ph ysics III
Mo de r n P h ysics
UIC Spring 2012
Ofce: SES 2272
P: (312) 996-4569
Modern Physics for Scientists and Engineers 2nd Edition, J. R. Tay
Problem 1. Photoelectric. [10 points]
(a) It is found that on metal .X (an unknown) only light with a wavelength smaller than 380 nm ejects
photo-electrons. Calculate the work function of this metal, in eV.
ll levu : 5%
Kqu: " ¢ he. «max :0 j
is; W? W -?:
Problem 2 [16 points]
(a) [5 pts] Write down an expression for the binding energy per nucleon for an atom in
terms of the mass of the atom (matom), the mass of the hydrogen atom (mH) and the
mass of the neutron (m,)
(Zn/1P + NMm MMvWDC /A
Experiment 3: The Emission Spectrum of
In this lab our objective was to investigate the emission spectrum of Hydrogen. We were to do
this using a diffraction grating and a spectrometer to resolve hydrogen into its v
Problem 1 [4 points each question]
MULTIPLE CHOICE QUESTIONS: SELECT ONLY ONE CORRECT ANSWER
1.1 An x-ray photon scattered off an electron imparts some of its energy to the electron
via the Compton effect. Which of the following is FALSE?
a) The wavelengt
Problem 2 [5 points each question]
Problem 21[5 pointseach question]
SHORT RESPONSE QUESTIONS, NO NO NEED TO SHOW YOUR WORK
SHORT RESPONSE QUESTIONS,NEED TO SHOW YOUR WORK
For each of the following nuclear processes indicate the name of the reaction
Experiment #1: The Photoelectric Effect
In this lab we investigated the photoelectric effect; the photoelectric effect is based on the
particle nature of light and its postulate is that light energy is quantized into small
Experiment 2: Bragg Scattering
In this lab our goal was to investigate the diffracting of x-ray through crystals. We are to
use radiation of a known wavelength to determine the crystal structure of atoms.
Experiment 6: Beta Decay of Nuclei
The purpose of this lab is to investigate beta decay of nuclei, in particular that of Thalium-204.
The momentum distribution of the beta particles is measured using a magnetic spectrometer.
Experiment 7: Interaction of Gamma
Radiation with Matter
The purpose of this lab is to investigate the behavior of gamma rays using a Geiger counter,
Cesium-137, and a collection of steel plates. The amount of particles meas
Experiment 5: Nuclear Lifetime
In this lab our purpose is to determine the half-life of an unstable Ba137 nucleus using a Geiger
Counter and counting the number of particles over 7 minutes in 30 second intervals.
Experiment 4: The Geiger-Mueller Counter
In this two part lab we had several objectives. The first was to measure radiation from nuclear decay of
alpha and beta particles using a Geiger-Mueller counter in its