Crookes radiometer

• 1. 

  N a type of radiometer consisting of an evacuated glass bulb containing a set of lightweight vanes, each blackened on one side. The vanes are mounted on a vertical axis and revolve when light, or other radiant energy, falls on them 克鲁克斯辐射计; 一种辐射计，由一个含有一组轻叶片的真空玻璃灯泡组成，每个叶片的一面被涂成黑色并被安装到一个竖直轴上，当有光或其它辐射能照到叶片上时，叶片会旋转 [physics]