由于光速极快,我们几乎能在开灯的那一瞬间就看见电灯亮起来。 Because of the great speed of light, we see a lamp light up almost at the exact moment we turn it on.
巨大的光速解释了为什么当我们在黑暗的房间里打开电灯时,灯和房间里的一切都似乎立即亮起来。 The great speed of light explained why when we turn on a lamp in a dark room, the lamp and everything else in the room seem to light up at once.
表示真空中光速的物理符号 The symbol for the speed of light in a vacuum.