Part 3/10:
Einstein's special theory proposed that time is not universal; it varies depending on an observer’s speed and position. As an object approaches the speed of light, time slows down relative to a stationary observer — a phenomenon known as time dilation. This revolutionary idea intertwined time with space, leading to the concept of space-time, wherein gravity itself is described as a curvature of this four-dimensional continuum.
Time in the Quantum Realm
Despite Einstein's groundbreaking work, both Newtonian mechanics and relativity treat time as a fundamental dimension. However, in quantum mechanics, the situation becomes more complex. Here, time is frequently regarded as an external parameter, a framework within which probabilities of different outcomes evolve.