I was watching Professor Leonard Susskind's lecture on Quantum Entanglements and he said that there are physicists and people who study physics, who 'rewire' themselves so they can visualize 4 dimensional spacetime in their heads. How can I learn to do this?

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    $\begingroup$ Grab a textbook and solve a lot of special relativity problems, especially the ones that involve graphing. $\endgroup$ Commented Feb 3, 2014 at 19:36
  • $\begingroup$ Related: physics.stackexchange.com/q/70897/2451 and physics.stackexchange.com/q/20469/2451 $\endgroup$
    – Qmechanic
    Commented Feb 3, 2014 at 19:47
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    $\begingroup$ This PDF might be useful. $\endgroup$
    – Řídící
    Commented Feb 3, 2014 at 19:47
  • $\begingroup$ You may want to try learning about Penrose diagrams; these provide a pictorial representation of space-time, and feature its causal structure. $\endgroup$
    – JamalS
    Commented Mar 25, 2014 at 21:35

1 Answer 1


I read the first paragraph of the PDF recommended by Glen The Udderboat, and didn't understand it. Here's the simple method that I use: drop one of the three space dimensions and replace it with the time dimension. Use the intuitive three-dimensional visualisation that you've used all your life, and swap space dimensions in and out if you really need to consider three spatial dimensions.


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