CHEM 205 Lecture Notes - Spectroscopy, Photon, Electronegativity
Document Summary
Spectroscopy: analysis of em radiation absorbed, emitted, scattered by matter to determine its structure or chemical composition, look at e and f of vibrations, nmr spectroscopy, nuclear magnetic resonance, nuclei have spins, nmr flips the spin, the e required=radiowaves. Important equations: e=hf (for photons) o, **note that units for wavenumber are in 1/cm! not 1/m due to e=hf we know that energy levels in atoms/molecules are quantized, light=particle wave duality, weird things about quantum world, heisenberg"s uncertainty principle: can"t know precisely position and momentum, 2 objects can occupy same space=superpositioning, info can travel faster than light=something can be 2 places at one. Ahh, an elegant universe quantum physics necessary to explain some experiment: black body radiation peak depends on t, not an expontential curve predicted by classical physics, photoelectric effect energy is quantized. note, when we don"t reach threshold for frequency, no voltage generated.
