2007-08-29 11:27:41 · 10 answers · asked by ruffian 2 in Science & Mathematics ➔ Astronomy & Space
There are two aspects of time.
The first is the space-time pulse that launched this universe,it is a quantum entity of minimum size and duration.
It orchestrates the evolution of the universe.
The second aspect is a time isolation that affects every entity in the universe.
Where ever you look you are looking back in time,even a person in the same room with you,you are seeing them as they were in the past,billionths of a second ago.
A star,maybe hundreds of years in the past.
The universe over lays a holographic affect that allows all incidents to interact as though no time isolation existed.
2007-08-30 02:35:32 · answer #1 · answered by Billy Butthead 7 · 1⤊ 0⤋
Space and Time are effectively just one entity called spacetime, at least that's what Einstein postulated. Time is considered to be the fourth dimension, so for instance you can specify a particular point in space using some sort of left-to-right measurement, some sort of up-to-down measurement, some sort of forward-to-backward measurement, and then a particular point in time.
Time is really just another measuring stick for the position of an object in spacetime, so to a certain extent, time can be used as a point of reference in the spacetime, and could be (albeit very loosely) described as a point in spacetime.
2007-08-29 11:39:33 · answer #2 · answered by merlindeguerre 3 · 1⤊ 0⤋
In physics, time and space are considered fundamental quantities (i.e. they cannot be defined in terms of other quantities because other quantities - such as velocity, force, energy, etc - are already defined in terms of them). Thus the only definition possible is an operational one, in which time is defined by the process of measurement and by the units chosen.
Periodic events and periodic motion have long served as standards for units of time. Examples are the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, heartbeats, etc. Currently, the unit of time interval (the second) is defined as a certain number of hyperfine transitions in Cesium atoms.
Time has long been a major subject of science, philosophy, and art. Its measurement has occupied scientists and technologists, and was a prime motivation in astronomy. Time is also of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in human lifespans.
2007-08-29 11:36:23 · answer #3 · answered by Anonymous · 2⤊ 1⤋
Quite the contrary.
According to General Relativity time is seen to be a component of space itself, it constitutes the fourth dimension of space, which is why space and time are collectively termed 'four dimensional spacetime'.
2007-08-29 12:00:09 · answer #4 · answered by Mandél M 3 · 1⤊ 0⤋
No. Time is an independent variable in classical science. But in relativity it depends on speed and gravity. In no case does it ever depend on position in space or anywhere else.
2007-08-29 11:43:17 · answer #5 · answered by campbelp2002 7 · 1⤊ 0⤋
Time is a measurement of the here and now.
2007-09-01 09:51:51 · answer #6 · answered by Anonymous · 0⤊ 1⤋
I guess that's as good an explanation as any.
Einstein himself, when asked what exactly time was, said:"Time is that which is indicated by clocks"
2007-08-29 11:33:44 · answer #7 · answered by WOMBAT, Manliness Expert 7 · 1⤊ 1⤋
No. It's a concept invented by stupid people who can only think in a linear manner.
2007-08-29 12:37:36 · answer #8 · answered by Anonymous · 0⤊ 2⤋
Yep, however it is relative!
2007-08-29 11:32:04 · answer #9 · answered by Chariotmender 7 · 1⤊ 0⤋
no, time is an invention of man
2007-08-29 11:32:39 · answer #10 · answered by Tony 3 · 1⤊ 2⤋