分ぶん光こう計けい

noun

spectrometer

A scientific instrument that measures properties of light over a specific portion of the electromagnetic spectrum. Often used in physics, chemistry, and astronomy.

See also: 分光器

• この実じっ験けんでは分ぶん光こう計けいを使つかって光ひかりの波は長ちょうを測そく定ていします。

  In this experiment, we measure the wavelength of light using a spectrometer.