Physics HL

Chapter 22: Quantum Physics

Build Chapter 22 from photon energy and photoelectric evidence to Compton scattering, matter-wave reasoning, and electron diffraction as direct support for wave-particle duality.

1 simulation entries

Simulation: Photon Energy, Momentum, and Surface Pressure

Tune wavelength, power, and absorption-vs-reflection mode to compare photon energy, flux, momentum transfer, and resulting pressure/force.

Appears in: 22.1 Photons, Energy Quantisation, and the Photoelectric Start, 22.2 Photoelectric Effect Evidence and Einstein's Equation, 22.3 Compton Scattering and Photon Momentum Evidence, 22.4 de Broglie Hypothesis and Matter-Wave Scaling, 22.5 Electron Diffraction, Bragg Geometry, and Quantised Orbits

Beam-To-Surface Interaction

interaction plateincoming photonspressure from momentum transfer: 4.45e-4 Paforce on plate: 2.67e-7 N

Photon Energy

2.431 eV

Photon Momentum

1.30e-27 kg m/s

Photon Flux

1.03e+20 /s

Photons per ns

1.03e+11