Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the bright hydrogen emission lines. Key fact Line emission spectra are ...
As zero-emission cars gain in popularity, you can expect to hear more about sustainable trains. The first zero-emission, hydrogen-powered ... operate on the Arrow line of the Metrolink train ...
"With the aim of studying the molecular gas in the obscured core of the galaxy NGC 4303, in this work we analyze the emission line spectrum obtained ... gas tracers like hydrogen cyanide (HCN ...