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  • special relativity - What do spacelike, timelike and lightlike . . .
    Space-like is a hypothetical spacetime where causality is dictated by faster than light FTL speed limit and when projected in our time-like or light-like spacetime this could even resemble to "Instantaneous action at a distance" or else known by famous Einstein as "Spooky action at a distance"
  • What is the connection between special and general relativity?
    Special relativity, while excellent at handling accelration, has no gravity in it The equivalence principle (s) says that locally, gravitation behaves like an accelrated system If you put that on top of "special relativity is true locally", and work through the math, general relativity falls out
  • general relativity - Space is stretching. Is time also stretching . . .
    That aside: General Relatively says that time is inexorably linked with space (they bend alongside each other) Is time also affected by similarly to the expanding of the fabric of space? Is time "slowing down" over time, or is "gravity" (a contortion in space-time) weakening? Or is the effect on time so minuscule that it's essentially
  • general relativity - How exactly does curved space-time describe the . . .
    So much for the explanation of how curved space-time (discussion above was just about space; if you introduce special relativity into the picture, you'll get also new effects of mixing of space and time as usual) But how does the space-time know it should be curved in the first place?
  • general relativity - How can space time be bent? - Physics Stack Exchange
    In special relativity the metric is constant and diagonal In general relativity the metric is not, and this is what we mean when we say spacetime is curved How can both of them be true at the same time? As discussed above, they are not really true "at the same time " Special relativity can be thought of as a special case of general relativity
  • special relativity - On the philosophy of spacetime transformations . . .
    In the physics we've studied upto and including special relativity, space and time are considered real physical objects each, and something like length contraction and time dilation were considered
  • Why does everyone say that the faster you move through space, the . . .
    People who say "the faster you move through space, the slower you move through time" have it the wrong way around It's really "the faster you move through space, the faster you move through time" Think of the classic twin paradox
  • According to General Relativity, Does The Past Exist?
    So the answer to your question is no General relativity treats time as a dimension like space (though with a different metric sign) This just means that observers with different speeds get different 3-dimensional perspective views of the same 4 dimensions, just as 2-dimensional perspective views for the same 3-dimensional object may differ
  • special relativity - How does velocity cause time dilation? - Physics . . .
    The central rule to relativity is the idea that all of physics is the same, no matter your velocity, and further that when you switch between reference frames, all the space and time coordinates transform into each other so that distances and durations change
  • general relativity - Can anyone explain me how time can bend according . . .
    General Relativity Einstein then went a step further He realised that considering time and space together as spacetime allowed him to think about gravity Einstein imagined spacetime being bent and warped by heavy objects This way, other object always move on straight lines but those lines look curved to us because spacetime itself is bent





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