speed of light

名词 speed of light:

1. the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
   同义词：light speed, c

1. The speed of light being extremely great, we cannot measure it by ordinary method.
   由于光的速度非常大，我们不能用普通的方法度量。
2. The symbol for the speed of light in a vacuum.
   表示真空中光速的物理符号
3. 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.
   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。
4. Because of the great speed of light, we see a lamp light up almost at the exact moment we turn it on.
   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。