Recent content by OnePound

Hello, I think the general operational theory of fluorescence is understood - a molecule accepts a photon, its electrons are excited from the ground state to a higher energy state, and, as they return to the ground state, they emit EM waves which we see as light. My question is what makes...

Hello all, Just wondering if anyone can give me some guidance on this: the problem is an apparent contradiction I've stumbled upon. Some sources (e.g. www.braeunig.us) suggest that maximum thrust is achieved when Pe=Pamb (i.e. exhaust pressure = ambient pressure)l whereas others say that...