More animation: quantum dots

It still needs some polishing but here's another draft animation (the slow version) for the project I mentioned in the last post. This one goes with a video about quantum dots, and describes how their super small stature gives them properties similar to atoms. Namely, they can absorb and emit light. Electrons get promoted to higher energy levels upon absorption of light, and the difference in energy levels corresponds to the energy, and thus the frequency, of light emitted. What is cool about quantum dots is that they absorb/emit different colors based on their size. So smaller dots glow blue, larger ones red, etc. Coincidentally, this week I taught my student about atomic line spectra, the same concept but just for atoms, not quantum dots. At least this week my brain didn't have to switch wavelenths.