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".
Einstein correctly predicted that the speed of light is constant relative to anything and everything.
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.
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".
Einstein stated that nothing can travel faster than light.
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
Einstein's work revolutionized physics with his theory of relativity, laying the foundation for modern cosmology and astrophysics. His famous equation E=mc^2 became a cornerstone in understanding the relationship between energy and mass. Additionally, his work played a crucial role in the development of nuclear energy and technologies.