Modern Physics

Photoelectric effect, Compton scattering, atomic spectra, radioactivity, and quantum mechanics interactive experiments.

• Photoelectric threshold
• Retarding potential
• Sodium photocell
• Compton scattering at 90°
• Compton backscatter (180°)
• Compton scattering at 45°
• Balmer α (Hα) line
• Lyman α line
• Paschen β line
• Carbon-14 decay
• Tc-99m medical tracer
• Iron-56 binding energy
• Electron de Broglie wavelength
• Electron double-slit
• Slow electron wave packet
• Heisenberg electron
• Nuclear-scale confinement
• Position–momentum tradeoff
• Light-clock time dilation
• Muon atmospheric survival
• Length contraction at β = 0.9
• Electron KE: classical vs relativistic