Is a Space-Time sheet flat?
Wednesday, October 12th, 2011 at
7:03 pm
Hey, so this relates to Einstein’s theory of relativity. Are all objects on a horizontal 2- dimensional sheet of space and time, or is the sheet 3 dimensional?
Filed under: Bed In A Bag
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It is three dimensional. You live in a multidimensional universe within space time. The word space time denotes a connection between space and time in that they are inter woven and inseparable. Space time is the very fabric of the universe.
space is 3 dimensional and time is the 4th dimension
it is attempted to be drawn on paper but that requires the viewer to imagine what it would look like in 3 dimensions, plus time pulling/pushing or whatever time does to space
The sheet is actually 4-dimensional – 3 spatial dimensions plus time. The rubber sheet analogy is a useful illustration, but most people have trouble imagining a 4-dimensional sheet. Just be satisfied that gravity bends time as well as space.
The question has another, quite interesting part – is the sheet flat, as opposed to slightly curved. This is not obvious when you start looking at large distances in the universe, on the order of billions of lightyears. After doing careful measurement of the radiation left over from the Big Bang, the conclusion is that space and time are indeed flat.