| A | B |
|---|
| photoelectric effect | indicates that light has characteristics of particles. |
| photon | light particle |
| threshold frequency | the minimum frequency at which electrons are ejected from a surface |
| work function | the minimum energy required to break the electron free from the attractive forces which hold the electron to the surface of a metal |
| positron | has the same mass as an electron and carries the same magnitude of electric charge but is positive |
| wave-particle duality | refers to the phenomena where both particles, such as electrons and protons, and light exhibit both the properties of waves and the properties of particles |
| Compton effect | shows the interaction of a photon with an electron can be viewed as a two-particle collision |
| de Broglie wavelength | the wavelength of a particle of mass m traveling at speed v; =h/(mv) |
| emission spectra | produced by high voltage placed across the electrodes of a tube contaiing a gass under low pressure. Shows the discrete lines of light |
| absorption spectra | produced by shining white light onto a gas. shows the discrete lines of light |
| ionization energy | the energy required to remove an electron from an atom |
| Photon energy | E=hf |
| Davisson-Germer experiment | proof that electrons act as waves because of interference pattern produced by electron waves |
