"Every point in the spacetime continuum is assigned four coordinates, which, according to Einstein, ‘have not the least direct physical significance’. He says that his field equations, whose derivation requires many pages of abstract mathematical operations, deprive space and time of ‘the last trace of objective reality’. Four-dimensional spacetime has some rather odd features. For instance, if a light pulse travels from point A to point B, the four-dimensional distance between them is said to be zero, regardless of how far apart they are in space!"
http://ourworld.compuserve.com/homepages/dp5/relativ.htm
2007-01-25 07:49:22
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answer #1
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answered by MishMash [I am not one of your fans] 7
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