When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the ...

Hydrogen, a promising fuel ... resulting in a dark line in the absorption spectrum, known as the absorption line. By measuring the amount of laser light that has been absorbed at this wavelength ...

The light from each star is directed through a prism to produce a spectrum. Each of the spectra has a set of absorption lines created by the presence of hydrogen in the stars' atmospheres.

FIGURE 1 shows the optical absorption spectrum ?(hv) of glow discharge a-Si:H [1, 2]. Also shown for comparison are the absorption spectra of c-Si [3] and hydrogen-free a-Si [4]. We are concerned here ...

Hydrogen gas is a promising ... resulting in a dark line in the absorption spectrum, known as the absorption line. By ...