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 ...

This causes an absorption spectra, as shown below. Because the energy levels are the same, the lines in the emission spectra of an element are in the same position as the lines in the absorption ...

Free-bound emission, linked to hydrogen recombination, dominates the spectra of galaxies like 9422 ... The first involves a damped Lyman-alpha absorption system (DLA), which accounts for the ...

A biohybrid system combines polymer nanosheets with E. coli to improve hydrogen production by capturing near-infrared light from the solar spectrum.

WE have recently been investigating the far ultra-violet absorption spectra of a number of organic compounds of the type R 1 COOR 2; R being an alkyl group or a hydrogen atom. It has been found ...

Astronomers have identified a bright hydrogen emission from a galaxy in the very ... very early galaxies have now made a discovery in the spectrum of its light, that challenges our established ...