light speed   (TTS Sound)

The light_speed has 1 Senses.

• c, speed of light, light speed
• 光速, c, 光速度, ｃ
• 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
• 光が真空を伝わる速度