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 ...

gave a bright line spectrum, proving that they are gaseous in nature. Helium was discovered in the sun in 1869 and a green line was observed in the spectrum, which proved to be unaccounted for in ...

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IT seems very improbable that the bright line spectrum of the inner corona can be attributed to thermal excitation of the coronal matter. We may seek its cause in the process of photoelectric ...

THE DARK-LINE SPECTRUM OF NOVA AQUILÆ ... into a nebula would seem to offer a sufficient explanation of the bright-line spectrum. To account for the supposed enormous velocity of the nova ...