Physics Department
PHYS 1P22/92
Sakai
Homework
Outline
Calendar entry
Lab Manual
PreLab Questions
Formula Sheet
Home
MC:
Energy of a
photon
Ex:
intensity
and photons
photoelectric effect
Apparatus
for observing the photoelectric effect
Effect of
changing voltage
The maximum kinetic energy is measured by the
stopping potential
Effect of
changing light frequency
Effect of
changing light intensity
Work Function
is different for different metal cathodes
MC:
How does the maximum photoelectron kinetic energy
change?
Ex:
cut-off frequency
Compton effect
photons carry momentum:
a comet's tail
points away from the sun
Inelastic
xray scattering
Compton Effect
data
Ex:
photon momenta in Compton scattering
de Broglie's matter waves (Nobel Prize 1929)
wave-particle duality
first evidence for wave nature of matter:
Davisson & Germer experiment
more evidence: electron
diffraction pattern
MC:
deBroglie wavelength I
MC:
deBroglie Wavelength II
MC:
deBroglie wavelength III
Ex:
wavelength of a baseball
The
Heisenberg
Uncertainty Principle
Classical Mechanics, Determinism and
Laplace's Demon
What is "waving"? The
probability
of finding an electron.
Ex:
two slit electron interference
Ex:
Heisenberg uncertainty principle
Quantization: particle-in-a-box
Structure of the hydrogen atom
Existence and size of atoms
Robert Brown
(Scottish botanist, 1773-1858) and
Brownian Motion
Einstein's PhD dissertation (1905)
Properties of beta rays (electrons)
JJ Thompson
and the
charge
of an electron (Nobel Prize 1906)
Robert Millikan (1868-1953)
and the
quantization of charge
On Millikan and others -
Betrayers of the Truth
Rutherford
Scattering
Nobel Prize in chemistry in 1908 - radioactivity and elemental transmutation
Gold foil
experiment
Classical Mechanics of
particle scattering
Geiger and Marsden's
data
Nuclear
strong force
is
short range
MC:
Rutherford Scattering
MC:
Nuclear Force
Atomic
Spectroscopy
Experiments
atomic spectra:
fingerprint of the atom
Hydrogen Spectra
: Lyman (UV), Balmer (VIS), Paschen, Pfundt,Brackett (IR)
MC:
Atomic Spectra
The
Bohr
model
atoms are
unstable
according to classical physics
quantization of angular momentum:
stationary non-radiating orbits
transitions between stationary orbits
Ex:
wavelength predictions
The Periodic Table
Dalton
(1766-1844), Dalton's
symbols
and
atomic theory
indistinguishable
alkali halide
crystals
Mendeleev
(1834-1907), visit to
Wieliczka salt mine
, and his card game
"Patience"
Mendeleev (1871 predictions) and
eka-Silicon
: Gallium (1875); Germanium (1886)
Schrodinger equation and quantum numbers
Radial
Probability Distributions Functions
Angular
Wave Functions
Quantum Numbers
and electron density
The
periodic table
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St. Catharines, Ontario, L2S 3A1
Phone: +1.905.688-5550
ext.
3412
Email:
physics@brocku.ca
Fax: +1.905.984-4857
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Updated: 31-Mar-2017 10:50