photocell
US /ˈfoʊ.t̬oʊ.sel/
UK /ˈfəʊ.təʊ.sel/
名詞
光電池, 光電管, 光敏電阻
a device that generates an electric current or voltage when exposed to light, or whose resistance changes when light falls on it
範例:
•
The streetlights are controlled by a photocell that turns them on at dusk.
路燈由一個在黃昏時自動開啟的光電池控制。
•
The automatic door uses a photocell to detect when someone is approaching.
自動門使用光電管來探測是否有人靠近。