IPA: //spɛkˈtrɒskəpɪst//
KK: /spɛkˈtrɒskəpɪst/
A scientist who studies the interaction between light and matter using a technique called spectroscopy.
The spectroscopist analyzed the light spectrum to identify the chemical composition of the sample.
Spectroscopist → It is formed from "spectrum" (from Latin *spectrum*, meaning appearance or image) and "-scopist" (from Greek *skopein*, meaning to look or examine). A spectroscopist is someone who examines or looks at the spectrum of light or other electromagnetic radiation.
Think of a 'spectrum' as an 'appearance' of light that a 'scopist' examines — that's why a spectroscopist studies light spectra.