I don't understand what this question is asking, can someone please explain.

In space, a beam of photons of different energies passes through a cloud of atomic hydrogen
gas. Explain, with a reason, what is likely to happen to photons of energy 19.38 × 10–19 J and
to some of the hydrogen atoms.

Reply 1

Marvel_fan

Hey! Is this question linked to energy levels in some of the other parts? I would guess they're looking for something to do with the photons being absorbed as they pass through the gas causing electrons to be excited

Reply 2

duiwhidwhdi

Yes it is sorry I didn't think the other parts were relevant, and you're right electrons are absorbed but can you tell me why they are and how this causes electrons to be excited?