continuous spectrum
light of all colors- produced by glowing solids (and liquids)
emission spectrum
produced by gases glowing- characterized by bright lines of color separated by dark lines
photoelectric effect
emission of electrons from metal when light is shined on the metal
photon
a massless "particle" of light
excited state
electrons with extra energy
ground state
electrons in the lowest (most stable) energy level
quantized energy levels
discrete/allowed "positions" of electrons around an atom
Hooke and Huygens
wave theory of light
Newton and LaPlace
particle theory of light
Hertz
electromagnetic theory of light
Plank
quantized theory of light
Einstein
photon theory
Neils Bohr
planetary model/energy levels/shells
De Broglie
electrons as waves
Heisenburg
uncertainty principal, cannot measure both the energy and position of an electron
Schrodinger
quantum theory of the atom