Abstract:
In classical mechanics, time is something that passes uniformly regardless of whatever happens in the world. For this reason Newton spoke of absolute space and absolute time. On the other hand, Einstein's Special Theory of Relativity predicted that time does not flow at a fixed rate: moving clocks appear to tick more slowly relative to their stationary counterparts. Quantum mechanics does not neglect the time either. In standard model, photon does not experience time. Some new theories suggest that time does not exist at the quantum level. The study of the quantum universe shows us that time does not exist. It shows us that time is a function of relativity only and exists relative to some arbitrary point of reference [1]. Whatever else may be said about time, one thing is certain, it defies definition. The best we can say is that we all know what time is, intuitively. The Seventh Edition of Webster's Collegiate Dictionary tells us that time is "the measured or measurable period during which an action, process, or condition exists or continues." Of course, what the lexicographer has done here is to tell us that time is defined by its measurement and that measurement is of a period during which something occurs. He has not told us what time really is [2]. In fact it is the definition of a clock. What is the nature of physical time, really? In this paper, I have tried to answer this question.
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