Time in Classical Physics
In classical physics, time is explained by Newton’s idea of absolute time. Newton said that time moves the same everywhere in the universe and is not affected by events. This means time flows steadily, like a clock ticking regularly, and no physical event can change it. In Newton’s mechanics, time is used as a constant and universal measure. For example, when we describe the movement of an object, we treat time as a fixed value in equations. However, in this view, time is only a tool for measurement, and its deeper nature is not questioned.
Time in Modern Physics
In modern physics, the concept of time changed with Einstein’s theory of relativity. Einstein showed that time is not absolute. Instead, it is part of a four-dimensional space-time. According to relativity, time can change depending on how fast someone is moving or the strength of gravity. For example, if a person moves very fast (near the speed of light), time will pass slower for them. This effect is called "time dilation." It is not just a theory; it is proven true in real-life technologies like GPS satellites.
