L2: Quantum Mechanics

Historical Context & Old Quantum Theory

The Schrödinger Equation

Wavefunction Interpretation & Key Principles

Particle in a Box (Infinite Square Well)

Empirical Success & Philosophical Notes

• Successes:

  • Accurately predicts hydrogen atom spectra, quantized energy levels.

  • Explains wave-particle duality (photoelectric effect, electron diffraction).

• Limitations:

  • No "derivation" of Schrödinger’s equation—it’s a postulate justified by experiment.

  • Interpretation of Ψ (Copenhagen vs. alternatives) remains debated.