2006-08-26 16:40:25 · 9 answers · asked by pradeep s 1 in Science & Mathematics ➔ Physics
The concept of spacetime was not conceived by Einstein, although the concept was a direct result of the equations of relativity. Spacetime was introduced by Minkowski who realized that the apparent differencies in time and space that observers moving with respect to each other see can be resolved by taking the interval between events as a combintation of space and time, rather than each separately. In ordinary three-dimensions we consider the interval between events to be defined by their separation in space plus their separation in time, expressed as
s^2 = x^2 + y^2 + z^2 (space interval) and t (time interval)
The Minkowski interval replaces this with a new interval defined as:
s^2 = x^2 + y^2 +z^2 - (c*t)^2 where c = light velocity.
When moving observers apply that measurement to the same events, they will agree on the result. If they consider the space and time separately, they will not agree. Therefore the conclusion that events exist in a four-dimensional world which is real, but our observations of that world are incomplete.
2006-08-26 20:11:25 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋
As per Einsten's theory the space is not as we can see. If you place a object of mass m in an empty space then the characteristics of space around it (which was empty before and now also empty) changes. Newton assumed this change as gravitation and Einstein formulated a mathematical model for it and is part of the theory of relativity. So the space is essentially a function of time and not just distance as specified the co-ordinates.
This essentialy means space is like a cloth that is held tight at 4 corners. if you place a stone in middle it makes a impression. similarly space curves depending on the positin of mass around it. because of this curve in space only planets, stars and all bodies orbits...
2006-08-28 04:08:14 · answer #2 · answered by A Bank 1 · 0⤊ 0⤋
Two views on the space and time.
===========
1.
There are an independent space and independent time:
We notice it on our planet - Earth.
It is a fhree - dimensional space.
2.
There is simultaneous union of space and time:
It is negative four-dimensional (Minkowski) space.
Herman Minkowski :
“ Henceforth, space by itself, and time by itself,
are doomed to fade away into mere shadows,
and only a kind of union of the two will preserve an independent reality.”
Question.
What is the “a kind of union of the two “?
The answer.
It is Vacuum. T=0K.
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http://www.socratus.com
2006-08-28 00:32:33 · answer #3 · answered by socratus 2 · 0⤊ 0⤋
Einstein was refering to our three spatial dimensions and the one dimension of time. But by spacetime, he was expressing how the dimension of time is truly entertwined with the spatial dimensions. Time is not just something separate from the spatial dimensions, but is related to them.
2006-08-26 23:46:56 · answer #4 · answered by an engineer 2 · 1⤊ 0⤋
It's 11:45 pm.
2006-08-26 23:43:42 · answer #5 · answered by pickle head 6 · 0⤊ 0⤋
dimensions of the universe
3 of space & 1 of time
2006-08-27 07:18:24 · answer #6 · answered by hellraiser 2 · 0⤊ 0⤋
a static motionless 4 dimensional object.
2006-08-26 23:45:48 · answer #7 · answered by your mom 2 · 0⤊ 0⤋
thats a fictious time just used for a reference
2006-08-28 09:53:08 · answer #8 · answered by light feather 4 · 0⤊ 0⤋
A four-dimensional depiction of positon (where something was and when it was there).
2006-08-26 23:46:24 · answer #9 · answered by birchardvilleobservatory 7 · 0⤊ 0⤋