spectrum

光のスペクトル

光を成分ごとに分けたときに現れる色の広がり。

やさしい英語で： The range of colors seen when light is split into its different parts.

• A prism reveals the spectrum of sunlight.
• Red lies at one end of the visible spectrum.
• The rainbow shows colors across the spectrum.

類義語： range of colors

よく使う表現： visible spectrum, color spectrum, spectrum of light

周波数帯域、電波スペクトル

無線信号を送るために使われる周波数の範囲。

やさしい英語で： A range of frequencies used to send radio signals.

• These signals use the radio spectrum.
• The company bought access to more spectrum.
• Different parts of the spectrum serve different wireless services.

類義語： frequency range

よく使う表現： radio spectrum, spectrum allocation, available spectrum

スペクトル

物質が出したり吸収したりする光やその他の放射の種類を示す分布。

やさしい英語で： A pattern showing which kinds of light or other radiation a substance gives off or takes in.

• Each gas produces a different spectrum.
• Scientists measured the sample's absorption spectrum.
• Bright lines in the spectrum helped identify the element.

よく使う表現： absorption spectrum, emission spectrum, spectrum of something