Definition and Role in Physics The speed of light, measured as 299,792,458 meters per second, is a fundamental constant that plays a crucial role in physics. It is not just the maximum speed at ...

Let’s explore how constant this speed of light fundamental constant really is.

The speed of light is 299,792,458 meters per second and that constant tells us much about cause and effect in the universe.

Specifically, Einstein's theory that light travels at a constant speed underpins the popular Theory of Relativity as well as our models for understanding what happened after the Big Bang.

Many things in life are constant. The crushing sense of disappointment after finishing a bar of chocolate, for example. The unpredictability of 2016. And, of course, the speed of light.

All matter moves through space-time at the universal constant— the speed of light— but this speed is shared between motion in space and the flow of time. Objects don’t speed up beyond light ...

Is nothing sacred anymore? The speed of light may not be a constant, two upcoming studies find. In terms of astronomy and physics, the speed of light in the near perfect vacuum of space is pretty ...

If the speed of light were shown to be non-constant across any of these metrics, or different among different types of light, it would lead to the biggest physics revolution since Einstein.

The speed of light is constant, or so textbooks say. But some scientists are exploring the possibility that this cosmic speed limit changes, a consequence of the nature of the vacuum of space. The ...

The speed of light in a vacuum is the ultimate cosmic speed limit. Just getting close to it causes problems: the weird distortions of Einstein’s relativity kick in, so time slows down, lengths ...

There's nothing faster than the speed of light. So, what would happen if a human managed to move at this universal speed limit?

The hyperdrive from Star Wars appears to depict an ultra-relativistic motion through space, extremely close to the speed of light. Under the laws of relativity, you neither reach nor exceed the ...