What is faster than the speed of light?

The speed of light in a vacuum is the maximum known speed, and nothing is faster than the speed of light.

The speed of light in vacuum is 299,792,458 m/s, which is about 3× 10? 5 km/s is the known upper speed limit. The speed of light refers to the propagation speed of light waves or electromagnetic waves in vacuum or medium. The speed of light in vacuum is the maximum speed of natural objects found at present.

Defined value of vacuum light speed for extended data: C0 = 299792458/s.

Calculated value of light speed: c0=299792.458km/s (generally 300000km/s).

Function: When the speed of one object relative to another is close to the speed of light, the time of one object relative to another slows down, and the time change conforms to Lorentz transformation. (In 1970s, it was confirmed by the difference of the same time and position of solar eclipse observed by satellite and ground observatory. The speed of light is the maximum speed known at present, and when an object reaches the speed of light, the kinetic energy is infinite, so it is impossible to reach the speed of light according to the current human cognition, so the problems of the speed of light and superluminal are beyond the scope of physics discussion.

Since the beginning of the 20th century, our theory has been subject to the speed limit verified by Einstein, namely186,282 miles per second (about 300,000 kilometers per second). Even if we accelerate the spacecraft to this speed, it will take nearly ten years to reach our nearest star system-Alpha Centauri (about 4.3 light years away) and return.

Resources Baidu Encyclopedia _ Light Speed