They were third cousins once removed. They became acquainted
when Einstein was in his middle teens.
According to Einstein's famous equation, it is related to mass and the speed of light (in vacuum).
Time was 'invented' billions of years before Einstein. He recognized that time and velocity were related and that the speed of light was the factor that joined them. You will find more information if you google "relativistic speed".
Albert Einstein did not determine the speed of light, rather that the speed of light was the maximum speed possible in the universe. The speed of light was discovered in the late 1600's by Danish astronomer Ole Roemer, using Jupiter and its moon Io. It was later used in Maxwell's equations of electromagnetism, and then later used by Albert Einstein in his theory of special relativity.
Einstein's theory of relativity states that mass cannot accelerate to or past the speed of light because it would require infinite energy. However, objects with no mass, like light, can travel at the speed of light because they do not have the same limitations. Thus, according to Einstein, you can approach the speed of light but never reach or surpass it.
Celeritas means 'at the speed of light'. In Einstein's formula E=MC2, the 'C2' stands for 'the speed of light times the speed of light, or, the speed of light times itself, or, the speed of light squared.
Nothing can exceed the speed of light - Einstein called it the "cosmic speed limit".
Albert Einstein I believe..............
He hypothesized that the speed of light is constant, no matter what the frame of reference is.
There was none. The speed of light was precisely the sameafter his passing as it had been before his birth.
Einstein
The speed of light is not limited in a vacuum - the speed of light is fastest in a vacuum. But that is what Einstein called the "Cosmic Speed Limit" - nothing can move faster than the speed of light in a vacuum, or even quite asfast.
E=mc2 E=energy m=mass c=speed of light Einstein's equation states that Energy equal mass times the speed of light squared