IPA: /spɛkˈtrɒskəpi/
KK: /spɛkˈtrɒskəpi/
The study of light and its interaction with matter, often used to analyze the composition of substances by observing their spectra.
Scientists use spectroscopy to identify the chemical makeup of distant stars.
Spectroscopy → It is formed from "spectro-" (from Greek "spektros", meaning to look or see) and "-scopy" (from Greek "skopein", meaning to examine or observe). The word refers to the examination of light and its spectrum.
Think of 'looking' ('spectro-') at different colors and 'examining' ('-scopy') them — that's what spectroscopy is all about.