385lec30 - PHYS 385 Lecture 30 - Atoms and electromagnetic...

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PHYS 385 Lecture 30 - Atoms and electromagnetic fields 30 - 1 ©2003 by David Boal, Simon Fraser University. All rights reserved; further copying or resale is strictly prohibited. Lecture 30 - Atoms and electromagnetic fields What's important : course outline review of old quantum theory Text : Gasiorowicz, Chap. ?? Spectroscopy allows us to test our quantum mechanical predictions. The “peak” measures two things area under peak is the intensity of the transition: ψ I + ô ψ f ô some operator representing the electromagnetic field. Intensity is proportional to < ψ f ô ψ i > 2 the energy of the emitted (or absorbed) photon tells us what the energy difference is between the emitting levels Energy levels The simplest spectrum will be that of the hydrogen atom, where the energy levels have the form E n = -[ constant ] / n 2 energy i γ = h ν = i - f γ f -1 / 1 2 = -1 -1 / 3 2 = -1/9 -1 / 2 2 = -1/4
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385lec30 - PHYS 385 Lecture 30 - Atoms and electromagnetic...

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