How would I explain this? I would start by saying that velocity is relative. Here is the definition for velocity: ...

Velocity is one of the simplest ideas in physics. It's just the distance you cover in the time it takes to cover that distance. That means velocity is always a mixture of space measurements and ...

SINCE the velocity of light is one of the most fundamental physical quantities, any measures which indicate its constancy with wave-length are of basic physical interest. Experimental ...

Time dilation is the relative difference in the passage of time between two entities due to a stark difference in either gravity or relative velocity.