noun

spectrograph

spectrograph

The astronomer used a spectrograph to analyze the star.

The astronomer used a spectrograph to analyse the star.

((a/the)) spectrograph an instrument that separates light into a spectrum and records it The astronomer used a spectrograph to analyse the star.

Synonyms: spectrometer (often used interchangeably, but technically different)

From 'spectro-' (from spectrum) + '-graph' (instrument for recording). It records a spectrum.

Break it down: 'spectro' (spectrum of light) + 'graph' (to write/record). It's a device that 'writes' the spectrum.

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