English Dictionary

absorption line

/æbˈsɔɹp.ʃn̩ laɪn/

noun

(physics, astronomy) A spectral line that corresponds to the absorption of electromagnetic radiation at a specific wavelength; the pattern of such lines is characteristic of specific atoms or molecules in the path of the radiation.

The absorption line in the spectrum indicates the presence of a specific element.

意味（1）

(physics, astronomy) A spectral line that corresponds to the absorption of electromagnetic radiation at a specific wavelength; the pattern of such lines is characteristic of specific atoms or molecules in the path of the radiation.