120 words · auto-generated from the episode video
22:14hydrogen. Okay? >> So any photon that is in lower energy, meaning longer wavelength, >> that's not going to be able to kick out that hydrogen and it's not going to be able to ionize. And this is actually something that we see a lot in stellar atmospheres because stellar atmospheres have a lot of ionized hydrogen. This is a blueprint of a blue super giant spectrum. And there you can see right at about >> uh that Balmer limit, you're going to get a massive discontinuity. >> Yes. >> Where there's a bunch of stuff at a higher wavelength because those photons don't have enough energy to ionize hydrogen. But the stuff that's with a smaller wavelength, so higher