In my text book, it says "For a system of one-dimensional oscillators, the energy levels are equally spaced and non-degenerate, so the number of quantum states in an interval dE is proportional to(adsbygoogle = window.adsbygoogle || []).push({}); dEso long asdEis much larger than the spacingh(h-bar)wbetween levels. In fact, we may conclude from this thatg(E)dEmust have the valuedE/h(h-bar)w."

1. Why are the energy levels are equally spaced? According to the Bohr Model of hydrogen, as the energy level is getting higher, the distance between two levels are getting closer.

2. Why should it be non-degenerate? What's the difference between degenerate and non-degenerate energy levels?

3. Why ish(h-bar)wthe spacing and as long asdEis much larger than it, the number of quantum states in an intervaldEis proportional todE? Also,dEis just the differential of energy, it should have no size and thus can't be measured to be compared with the spacing.

Can someone help to explain a bit on these?

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# Questions for 1-D harmonic oscillators

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