Emission-lines sentence example

emission-lines
  • spectra has been recognized, in which, as well as the usual absorption bands, bright emission lines of hydrogen appear; stars having this particular spectrum are always variable.
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  • The standard nebula filter takes out a larger chunk of emission from orange out to the start of the nebula filter takes out a larger chunk of emission from orange out to the start of the nebula emission lines.
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  • Narrow bandpass filters also take out sky glow emission lines which also helps to improve the visual contrast of very faint nebulae.
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  • The spectrum is of the third type with bright hydrogen emission lines (see below, Spectra of Stars).
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