noun
spectroscope; spectrograph
A scientific instrument used to measure properties of light over a portion of the electromagnetic spectrum. Often used in physics, chemistry, and astronomy.
See also: 分光計
分光器を使って星の光を分析する。
Analyze starlight using a spectroscope.
この実験では分光器が必要です
A spectroscope is necessary for this experiment.
Compound of 分光 (spectral, light-dispersing) and 器 (instrument). The exact historical derivation is uncertain, but the term is a standard modern technical coinage.