Recent content by photon stew

Yes. This is the reason why this kind of spectroscopy is called linear, isn't it? Ultimately, I'm interested in nonlinear stuff but I realized that I don't understand linear spectroscopy very well, so I wanted to learn more about it first.

At first, I'm interested in the former.

Speaking in layman terms, the particles keep a distance between them because they don't interact directly but via other particles called gauge bosons. In the case of quarks, these could in principle be the gluons of the strong interaction, but they only act on very small distances. In your case...

Hi! I'm a little confused about simple spectroscopy. In typical absorption experiments, we scan the laser frequency w and get a anti-peak/dip in the transmitted intensity I(w) around a resonance frequency. The size of the dip, i.e. the population of the excited level, usually depends linearly on...