waves - • energy = Planck's constant x frequency o E = hn...

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electromagnetic radiation  - aka radiant energy   visible light is a type of electronmagnetic radiation speed of light = 3.00 x 108 m/s wavelength - distance between successive peaks/troughs frequency - # of complete wavelengths/cycles that pass a point per second amplitude - intensity of radiation; max height of wave (frequency)(wavelength) = speed of light = c = nl o frequency = n o wavelength = l smaller wavelength >> higher frequency >> more powerful radiation Planck's constant  - 6.63 x 10-34 J-s   quantum - "fixed amount;" smallest quantity of energy that can be emitted/absorbed energy always emitted in chunks of minimum size
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Unformatted text preview: • energy = Planck's constant x frequency o E = hn • energy quantized, can only increase in steps (though steps are extremely small) • photoelectric effect- photons striking metals cause electrons to be emitted o photon- energy packet, transfers energy to electrons o energy of photon = E = hn • 6.02 x 1023 photons per mol Find energy of 1 photon light w/ wavelength 589 nm • c = nl • 3.00 x 108 m/s = n(589 nm) • n = (3.00 x 108 m/s) / (5.89 x 10-7 m) = 5.09 x 1014 s-1 • E = hn • E = (6.63 x 10-34 J-s)(5.09 x 1014 s-1) = 3.37 x 10-19 J/photon...
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This document was uploaded on 10/30/2011 for the course CHEM 161 at Rutgers.

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