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Unformatted text preview: FREQUENTLY ASKED QUESTIONS February 3, 2012 Content Questions In the slide with the orbital distributions we saw, there were 5 columns, s, p, d, f. I thought the first four L states were s,p,d,f. Where did the e come from? Hmm, you are right, thats odd. Im not sure where the figure came from I cant find it on the web now. Yes, first four l values should be s, p, d, f. Ive replaced the figure. Can you explain why exactly stimulated emission works? Well, a full description requires power-quantum-mechanics. However, heres a qualitative explanation, which might be helpful for physical understanding: think of it as a resonance situation. You may remember resonance as a phenomenon that happens when a system is excited at the same frequency as its natural frequency: when this happens, very large amplitude oscillations can occur. An examples for a mechanical system is a parent pushing a child on a swing: when the pushes happen at the right frequency and phase, the child can go very high (and perhaps fall off the swing if the parent pushes too hard!) Another example is seismic excitation that matches natural vibration modes of a building: there can be large amplitude oscillations, possibly leading to significant damage.possibly leading to significant damage....
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This note was uploaded on 02/26/2012 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.
- Spring '08