12 量子物理 How did the electric guitar revolutionize rock? From acoustic to electric guitars

Sections 電磁感應 物質的磁性 電磁波

12-1.1 Two symmetric Situations current loop + magnetic field → torque torque + magnetic field → current

12-1.1 Photon and Matter Waves Light Waves and Photons

The Photoelectric Effect

The experiment First Experiment – the stopping potential Vstop Second Experiment – the cutoff frequency f0

The graph

The Photoelectric Equation

12-1.2 Compton Effect

實驗圖表 The loose end: the peak at the incident wavelength is due to the tightly bound electrons.

圖示

Energy and momentum conservation

Frequency shift

12-1.3 Light as a Probability Wave The standard version

The Single-Photon Version The single-photon, double-slit experiment is a phenomenon which is impossible, absolutely impossible to explain in any classical way, and which has in it the heart of quantum mechanics - Richard Feynman

The Single-Photon, Wide-Angle Version

Light is generated in the source as photons Light is absorbed in the detector as photons Light travels between source and detector as a probability wave

39-6 Electrons and Matter Waves The de Broglie wave length

39-7 Schrodinger’s Equation Matter waves and the wave function The probability (per unit time) is 

The Schrodinger Equation from A Simple Wave Function

40 More on Matter Waves 40-2 Waves on Strings and Matter Waves

Confinement of a Wave leads to Quantization – discrete states and discrete energies 40-3 Trapping an Electron

Finding the Quantized Energies

The Energy Levels The Zero-Point Energy

The Wave Function and Probability Density

Normalization (歸一化) 40-4 A Finite Well

40-5 More Electron Traps Nanocrystallites

Quantum Dots

Quantum Corral

40-6 The Hydrogen Atom The Energies

Bohr’s Theory of the Hydrogen Atom Quantum Numbers for the Hydrogen Atom

The Ground State Wave Function

Quantum Numbers for the Hydrogen Atom

The Ground State Dot Plot

N=2, l=0, ml=0

N=2, l=1