Transcript 264-lecture-2015-10

Quantum Mechanics Mnemonic for p
“Now I need a drink, alcoholic of course,
after the heavy lectures involving
quantum mechanics.”
3.14159265358979323846264338
32795028841971693993751
Establishing that E = h f
Photoelectric Experiment of Lenard
Stopping Voltage Versus Intensity I
And Versus Frequency f
Photoelectric Experiment of Millikan
Test eV0 = KEmax = hf – f, deduce h
Class Discussion: Use Photons To
Explain Fluorescence of Light Under UV Lamp
Blackboard discussion of
Compton effect formula
Establishing that Photon is Particle I
Compton Effect (X-Ray Scattering)
Make X-Rays with Electron Beam
Bremsstrahlung:
braking radiation
Class discussion:
how to tell X-Ray is
light, not an electron
or neutron or other
massive particle?
Establishing that Photon is Particle II
Compton Effect (X-Ray Scattering)
Establishing that Photon is Particle II
Compton Effect (X-Ray Scattering)
Quantitative Confirmation of de Broglie’s Relation:
Crystal Diffraction of Electron Beam
by Davisson and Germer
The Davisson-Germer Experiment:
Crystal Acts Like Thin-Film Interference
Scattering of Electrons Exactly Like X-Rays
Confirms de Broglie Relation and
Crystalline Structure of Surface
Varying Voltage V0 of Electron Gun Varies
de Broglie Wavelength l