spectroscope

a spectrum

to use / to employ / to make use of, to apply / to spend

a spectrum

to divide light into a spectrum

(mathematics, chemistry) analysis

to analyze

a light, beam, illumination / a gleam, glow, ray / a glimmer, shine, sparkle / a luster/lustre, polish, sheen / glory, influence, power / a glimmer, gleam / positive aspect

container, vessel / a tool, a utensil / one's degree of ability: talent, calibre / female genitalia: a vagina

use one thing for many purposes / work someone hard