Quantum physics (quantum theory, quantum mechanics)
Quantum physics (quantum theory, quantum mechanics) Quantum physics (quantum theory, quantum mechanics)
Comparison with Bohr model Angular momentum (about any axis) assumed to be quantized in units of Planck’s constant: L n, n1,2,3, z Bohr model Quantum mechanics Angular momentum (about any axis) shown to be quantized in units of Planck’s constant: L m, ml, , l z Electron otherwise moves according to classical mechanics and has a single well-defined orbit with radius r n 2 na0 Z , a Bohr radius 0 Energy quantized and determined solely by angular momentum: 2 Z En E , Hartree 2 h Eh 2n Electron wavefunction spread over all radii; expectation value of the quantity 1/r satisfies 1 Z , a0 Bohr radius r 2 na0 Energy quantized, but is determined solely by principal quantum number, not by angular momentum: 2 Z En E , Hartree 2 h Eh 2n 10
Multi-electron Atoms Similar quantum numbers – but energies are different. No two electrons can have the same set of quantum numbers These two assumptions can be used to motivate (partially predict) the periodic table of the elements. 11
- Page 1 and 2: Quantum physics (quantum theory, qu
- Page 3 and 4: Homework from 2 nd lecture Calcula
- Page 5 and 6: QUANTUM MECHANICS new kind of physi
- Page 7 and 8: Uncertainty principle • Uncertain
- Page 9: Quantum Mechanics of the Hydrogen A
- Page 13 and 14: Photon properties Relativistic rel
- Page 15 and 16: Compton (1923) measured intensity o
- Page 17 and 18: Before Incoming photon p Compton s
- Page 19 and 20: WAVE-PARTICLE DUALITY OF LIGHT Ein
- Page 21 and 22: Fringe spacing in double slit exper
- Page 23 and 24: Double slit experiment: low intensi
- Page 25 and 26: Double slit experiment - QM interpr
- Page 27 and 28: double slit expt., wave function
- Page 29 and 30: Electron Double-Slit Experiment C.
- Page 31 and 32: Which slit? Try to determine which
- Page 33 and 34: Wave - particle - duality So, ever
- Page 35 and 36: The Copenhagen Interpretation Bohr
- Page 37 and 38: Splitting of atomic energy levels B
- Page 39 and 40: Stern-Gerlach experiment (1921) Ove
- Page 41 and 42: The concept of spin Stern-Gerlach
- Page 43 and 44: Problems: Homework set 3 HW3.1: te
Multi-electron Atoms<br />
Similar <strong>quantum</strong> numbers – but energies are<br />
different.<br />
No two electrons can have the same set of<br />
<strong>quantum</strong> numbers<br />
These two assumptions can be used to motivate<br />
(partially predict) the periodic table of the<br />
elements.<br />
11
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