PAP Physics Review Ch 23&25 – Atomic and Nuclear

• Wave particle duality• Energy of a photon E f

– Light intensity determines number of photons per second; frequency determines energy per photon; all photons travel at the same speed

• Photoelectric effect

• Blackbody radiation and the ultraviolet catastrophe• Compton effect• de Broglie wavelength; =h/p=h/mv• Energy level diagrams, line-emission spectra

and spectroscopy• Alpha, beta, and gamma decay

– Know how each affects mass # and atomic #• Half-life• Strong nuclear force• E=mc2

• Fission and fusion

1

Ehc

hfE

Kmax=hf -=hft

= work function minimum amount of energy required to remove electron from a metal

ft = threshold frequency minimum frequency that will eject electrons from a specific metal