reflector

noun

optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece
接眼レンズで増幅する画像を作る大きな凹面鏡で成る光学望遠鏡
- Isaac Newton invented the reflecting telescope in 1668
  アイザック・ニュートンは、1668年に反射望遠鏡を発明した
device that reflects radiation
放射線を反射する装置

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