What causes time ?

Question

I possibly had some sort of deja vu, or so.. I've got an instant idea about the origin of time and would like to ask, whats the exact definition of time is today.

ok, despite that it is connected to space and both form what we call spacetime, i'm still not satisfied why it appears to run just forward for us.
how is time defined, and where can one see why its just moving forward ?

aaah ...ashes on my head i forgot about ENTROPY
i should have known by taking a look into my kitchen

Answer 1

theoretically, time is only defined by the amount of thought processes the human brain creates and analyzes...for instance, time goes by "faster" when you're asleep because the brain crosses less synapses than normal.Theoretically.

Answer 2

Consider an event like smashing a glass. If time could reverse wouldn't it be possible for the pieces to reassemble into a glass? Movies can run backwards and show you how unlikely this is.
The energy expended by any process increases randomness. If you knock over a bookcase, it will take you much more energy to put the books back than it did to knock the case over. Imagine how much energy it would take to get the atoms of an exploded liquid back to its liquid state.
Einstein defined time as that which can be measured by a clock. He wasn't being silly. Any definition of time you try to come up with will compare one event to another - may as well be a clock.

Answer 3

Your wording of your question, "what is the exact definition of time," makes it easy to answer.

There is no exact definition of the word "time." The word is used in varying ways in the English language to describe observed phenomena. As Braxton said, this is usually related to the comparison of events.

Physicists used to use time as a standard based on repeated motions (such as the sun) to measure the motions of physical objects. Now other standards like atomic decay are used, based on theories that predict they make a good, reliable standard for measurement.

The notion that time exists as an extra "dimension" is convenient for physics theories, but that doesn't mean there's something real out there similar to space that things can move through. before you ask yourself, 'can time run another direction than forward', you should first consider just what time "running forward" means.
Does it mean there's a space-like dimension, with different directions, and things in the universe are going forward through it?

No. Time "running forward" is a result of the word "time" being used to mean a scalar measurement of motions or differences between events. In this usage, people usually assign a later event a higher value than an earlier event, causing the measurement to seem to move in a positive "direction" as events proceed.

Other usages of time find it convenient to have it move in a NEGATIVE "direction." Example: "you're running out of time!" time is here used to measure again two events, but this time the later event has the lesser value. Consider you look at your watch and realize you have 10 minutes to reach the bus depot before the bus leaves. Between the two events(looking at your watch, bus leaves the depot), you're looking at your watch repeatedly to see the "time left." The way time is used as a measurement this time runs backwards, from 10 minutes to 0 minutes.

In its physics-related usage, time is a measurement. There's no reason to suppose it's anything else. Time can measure motion, it can measure events. It can be a useful tool in formulating physical laws. But that doesn't mean it's a tangible thing that can be "moved" through - backwards or forwards.

Answer 4

The passage of time is marked by increased entropy in the whole system (it can decrease in portions of a system) - energy evens out and because we use differences in energy level to do work, eventually energy flow will cease. The pace of change is a observed thing, the fact of change is not: people, objects, air go from an state of higher energy to lower and entropy increases.

Answer 5

Time is not a NATURAL feature of the universe. It does not exist of and by itself. Time is nothing more than a concept we use to separate events into what we call 'past,' 'present,' and 'future.' There's no absolute time, like some Cosmic Master Clock ticking away the correct time for the entire universe. There's no physical past following along behind the present, nor any physical future waiting up ahead for us to get there.

Answer 6

Perhaps time does move backward in another universe. But life cannot be sustained on such a universe, as life requires the forward passage of time.

So the only reason why time for us flows forwards is that time has to flow forward for us to be here in the first place.

Answer 7

The concept of time results from memory.Memory creates the sense of here and now , before and after , there and then.

If one does not have memory then one will not have any sense of motion because one will not be remembering where one was a moment earlier.

There will be no past ,no future. Only present ( here and now) will exist. Time and space(distance) will then be meaningless.

There will be no sense of good or bad because comparison will not exist,there will not be any sense of' your' and' mine'

Every activity will freeze .All development will stop because all improvement comes from use of memory.

Answer 8

Time itself is the period between two events. and it is measured by how long it takes light to travel 2.998*10^8 metres. i.e if i drop a glass 19.8 metres it will take 2 seconds to hit the ground. The time in a day is measured by the earths movement.
Although einstein proved that time changes at high speeds, the effects of this can only be seen at very high speeds. so is ot applicable to us.
So time is what you want it to be.

Answer 9

Problem is...
How do you know time is moving forward?

The way I think of time is existance. As long as something exists there is time.

Answer 10

Continuity and a need for order.