Recent content by 110010

Thank you all for the replies!

Thank you for the answers mfb. Then, for the first question, in quantum mechanics we can describe what is going but cannot why or how it is going on, right?

Hi there, I've a few (probably very basic) questions about photon-electron (light-matter) interactions. Here we go: 1) How can an electron "understand" that the frequency of incoming photon is equal to its excited state and so absorb that. Is there any "virtual" resonance between the...