Help! I need help on this problem; you don't have to work it out, but I'd like to know how to figure out how many 21-cm photons are emitted per second and how that relates to mass equationally?
On average, a hydrogen atom emits a 21-cm photon once every 15 million years. How many 21-cm photons does a 100 solar-mass gas cloud emit per second?
On average, a hydrogen atom emits a 21-cm photon once every 15 million years. How many 21-cm photons does a 100 solar-mass gas cloud emit per second?