01-10-2011 Notes

01-10-2011 Notes - The Photoelectric Efect Einstein (1905),...

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Unformatted text preview: The Photoelectric Efect Einstein (1905), found that by shining a light onto a clean metal surface, electrons will be ejected and current can flow. Einstein won the Nobel Prize for these experiments and his conclusions from them. Classical Predic2on Current Intensity If light is only a wave, then its energy should be determined by the amplitude (intensity) of the wave. Current (electrons/sec) should be proportional to light intensity This also implies that the frequency of the wave does not play a role and red and blue light should eject electrons from the metal Classical Predic2on Current Intensity If light is only a wave, then its energy should be determined by the amplitude (intensity) of the wave. Current (electrons/sec) should be proportional to light intensity This also implies that the frequency of the wave does not play a role and red and blue light should eject electrons from the metal surface with equal ability. Experimental Observa2ons Important Observable 1 There is a minimum frequency of light that must be applied...
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01-10-2011 Notes - The Photoelectric Efect Einstein (1905),...

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