• Question: is time travel possible?

    Asked by kevin to Kamal on 16 Jan 2017.
    • Photo: Kamal Bhattacharya

      Kamal Bhattacharya answered on 16 Jan 2017:


      In classical physics no. In special relativity only if you can be faster than the speed of light, thereby no. In general relativity, where we think of a spacetime continuum, there is a concept called wormholes, which in principle allows you to go from one place at a given time to another place at a given time. But physically you need the energy of a large massive star to open a wormhole. So rather not try it at home.

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