Recent content by ray.deng83

In my textbook, 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 dE so long as dE is much larger than the spacing h(h-bar)w between levels. In fact, we may conclude...

Yes and that's why we need those distribution functions. Thanks for your help!

So, probability can be used to describe an event within a discrete distribution which has finite entities and probability density is for an interval in a continuous system. This is because there are infinite entities in a continuous system and any probability of finding a specific one is zero...

Like the title, I don't quite understand what probability density is and its difference with probability. Can someone explain a bit on this?

Hi, I'm a student learning Solid State Physics and in a chapter of Classical Free Electron Theory of Metals in the textbook, it mentions "Since in the absence of a (electric) field there can be no net current, it is clear that the average thermal velocity over the equilibrium (thermal velocity)...