7A Quantum Effects# 7A10 Photoelectric Effect# 7A15 Millikan Oil Drop# 7A20 Compton Effect# 7A50 Wave Mechanics# deBroglie%20applied%20to%20Bohr Tunneling_1_ Tunelling%20_2_ 7A55 Particle/Wave Duality# 7A60 X-ray and Electron Diffraction# Bragg-scattering 7A70 Condensed Matter#