What is the speed of light

The speed of light in a vacuum, denoted by the symbol "c," is approximately 299,792,458 meters per second (m/s). This value is a fundamental constant in physics and is considered the maximum speed at which information or energy can travel in the universe according to Einstein's theory of special relativity. In other words, nothing with mass can travel at or faster than the speed of light in a vacuum.

The speed of light is a crucial parameter in various branches of physics, including electromagnetism, optics, and relativity. It plays a central role in our understanding of the universe and has profound implications for concepts such as causality, time dilation, and the structure of spacetime.