輝き線せん

noun

emission line

Technical term in physics and astronomy for a bright line in a spectrum produced by emission of light at a specific wavelength.

• この星ほしのスペクトルには強つよい輝き線せんが見みられる。

  Strong emission lines can be seen in the spectrum of this star.

• 輝き線せんの波は長ちょうから元げん素そを特とく定ていできる。

  Elements can be identified from the wavelengths of emission lines.