The liquid is without colour, and gives no absorption spectrum.
This colour possesses an absorption spectrum (figured at p. 55).
It is conspicuous by its absorption spectrum in many of the white stars.
absorption spectrum n.
The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium.
|absorption spectrum |
The range of frequencies of electromagnetic radiation readily absorbed by a substance by virtue of its chemical composition. See more at atomic spectrum.