In physics, space-time is a four-dimensional continuum consisting of three dimensions in space and one dimension in time. This mathematical model, which is an integral part of Einstein’s relativity theory, combines space and time into a single continuum that allows physicists to more uniformly describe the workings of the universe. The merger of space and time is often represented as a measure of distance expressed in units of time, a calculation that involves dividing distance by what constant?
powered by The Free Dictionary