+18 Speed Of Light Definition And Example 2023. In a vacuum, the speed of light is 299,792,458 meters per second. Speed of light = distance time.
Web as a result, distance (metre) and time (second) are measured and defined in terms of speed of light, which is a constant value. Web it is exactly 299,792,458 metres per second (983,571,056 feet per second) by definition. The definition of a metre is the distance light travels in 1/299,792,458 second.
