霧きり箱ばこ

noun

cloud chamber

A physics device used to visualize ionizing radiation by creating a supersaturated vapor that forms cloud trails.

• 霧きり箱ばこを使つかって放ほう射しゃ線せんの飛ひ跡せきを観かん察さつした。

  We observed the tracks of radiation using a cloud chamber.