Question

What is TIME and carefully describe it.

Answer 1

Time is a components quantity of various measurements used to sequence events, to compare the duration of events ir the intervals between them and to quantify the rates of change of quantities in material reality or in the conscious experience

Answer 2

$PHYSICS$$OF$$TIME$
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Physics is the only science that explicitly studies time, but even physicists agree that time is one of the most difficult properties of our universe to understand. Even in the most modern and complex physical models, though, time is usually considered to be an ontologically “basic” or primary concept, and not made up of, or dependent on, anything else.

In the sciences generally, time is usually defined by its measurement: it is simply what a clock reads. Physics in particular often requires extreme levels of precision in time measurement, which has led to the requirement that time be considered an infinitely divisible linear continuum, and not quantized (i.e. composed of discrete and indivisible units). With modern atomic time standards like TAI and UTC (see the section on Time Standards) and ultra-precise atomic clocks (see the section on Clocks), time can now be measured accurate to about 10−15 seconds, which corresponds to about 1 second error in approximately 30 million years.

But several different conceptions and applications of time have been explored over the centuries in different areas of physics, and we will look at some of these in this section.

In non-relativistic or classical physics, the concept of time generally used is that of absolute time (also called Newtonian time after its most famous proponent), time which is independent of any perceiver, progresses at a consistent pace for everyone everywhere throughout the universe, and is essentially imperceptible and mathematical in nature. This accords with most people’s everyday experience of how time flows.

However, since the advent of relativity in the early 20th Century, relativistic time has become the norm within physics. This takes into account phenomena such as time dilation for fast-moving objects, gravitational time dilation for objects caught in extreme gravitational fields, and the important idea that time is really just one element of four-dimensional space-time.

Relativity also allows for, at least in theory, the prospect of time travel, and there are several scenarios which allow for the theoretical basis of travel in time. There are even theoretical faster-than-light time-travelling particles like tachyons and neutrinos. However, the concept of time travel also brings with it a number of paradoxes, and its likelihood and physical practicality is questioned by many physicists.

Quantum mechanics revolutionized physics in the first half of the 20thCentury and it still represents the most complete and accurate model of the universe we have. Time is perhaps not as central a concept in quantum theory as it is in classical physics, and there is really no such thing as “quantum time” as such. For example, time does not appear to be divided up into discrete quanta as are most other aspects of reality. However, the different interpretations of quantum theory (e.g. the Copenhagen interpretation, the many worlds interpretation, etc) do have some potentially important implications for our understanding of time.

$PHILOSOPHY$$OF$$TIME$
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There is general agreement among philosophers that time is continuous (i.e. we do not experience it as stopping and starting, or darting about at random), and that it has an intrinsic direction or order (i.e. we all agree that events progress from past to present to future). There is also a more or less general agreement that is it objective, and not subjective or dependent on its being consciously experienced, which is borne out by the almost universal agreement on the time order of so many events, both psychological and physical, and the fact that so many different physical processes bear consistent time relations to each other (e.g. the rotation of the Earth, the frequency of oscillation of a pendulum, etc). However, even given that, many differing opinions and approaches to what time actually is have been put forward over the centuries.

The ancient philosophy of India and Greece was among the first to confront and question the real nature of many things that had been taken for granted (e.g. matter, space, nature, change, etc), and time was one of the many mysterious concepts they argued about at length.
During the Age of Enlightenment of the 17th and 18th Century, early modern philosophy began once again to consider questions of whether time is real and absolute or merely an abstract intellectual concept that humans use to sequence and compare events. In the 19th Century, philosophers began to question whether the present was really an instantaneous concept or a duration, and the conventionalists and phenomenologists all made their own contributions to the debate on time.


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