At a stationary source, light moves at a speed of 300,000 km/sec (186,000 mph).
No object can go more quickly than 300,000 kph. Only massless particles, such as the photons that constitute light, are capable of traveling at that speed. Any material item cannot be accelerated to the speed of light since doing so would require a limitless supply of energy.
Speed of light :
Speed of light, the rate at which light waves move through various substances. Specifically, the speed of light in a vacuum is presently calculated to be 299,792,458 meters per second. One of nature's basic constants is the speed of light. Its importance extends far beyond its use in characterizing an aspect of electromagnetic waves. It acts as the universe's only limiting velocity, setting an upper limit on both the speed of all material particles and the speed at which signals can travel.
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