1. Cosmos
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    17 Jul '17 19:59
    How can scientists prove more than 4 dimensions?
  2. Cape Town
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    17 Jul '17 21:06
    By experiment.

    First they need a theory with more than four dimensions that makes predictions.
  3. Cosmos
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    18 Jul '17 00:28
    you mean, like String theory
  4. Subscribermoonbus
    Uber-Nerd
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    18 Jul '17 04:59
    There are as many dimensions as needed. They cannot all be visualized, of course, because most of them have no sensory analogues.

    https://en.m.wikipedia.org/wiki/Topological_data_analysis
  5. Germany
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    18 Jul '17 06:28
    Originally posted by ogb
    How can scientists prove more than 4 dimensions?
    In physics and mathematics, one can and does use any number of dimensions depending on the problem at hand, including zero, one, any finite number, infinite and fractional.

    You're probably referring to string theory. While I'm not an expert on the topic, as far as I understand many variations of string theory require more than 4 physical dimensions. You would show that these theories are correct by empirically verifying their predictions. In the case of string theory, this is extremely hard, which is why few people are working on the topic.
  6. Subscribersonhouse
    Fast and Curious
    slatington, pa, usa
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    19 Jul '17 22:041 edit
    Originally posted by @kazetnagorra
    In physics and mathematics, one can and does use any number of dimensions depending on the problem at hand, including zero, one, any finite number, infinite and fractional.

    You're probably referring to string theory. While I'm not an expert on the topic, as far as I understand many variations of string theory require more than 4 physical dimensions. ...[text shortened]... case of string theory, this is extremely hard, which is why few people are working on the topic.
    Here is a book I read:

    The Trouble with Physics, by Lee Smolin:

    https://en.wikipedia.org/wiki/The_Trouble_with_Physics

    This Wiki gives a 50 cent tour of the book. He hates string theory, bottom line🙂

    And another physicist chimes in: Peter Woit

    https://en.wikipedia.org/wiki/Peter_Woit

    Woit and Smolin both object to string theory on the grounds it has yet to make a single prediction that can be tested by any kind of technology in the foreseeable future.
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