In Einstein's Theory of Relativity, the idea that time is not absolute but rather depends on the observer's speed challenges the classical view of time, which is often referred to as ___.

The classical view of time is often called “absolute time. ” In this view, everyone would measure the same time regardless of their motion. Einstein showed that if you move fast, clocks run slower, so time changes with speed. This means time is not fixed but depends on how an observer moves. For example, a twin who travels near light speed ages slower than the twin who stays on Earth, proving that time is relative, not absolute.