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Twin Paradox: Relation between Age and Speed of light .

  1. Nov 24, 2015 #1
    Hey Friends,
    In Einstein's special relativity I find "Twin Paradox", where Dick and Jack, two twins . one of them went to space at a speed of 0.80c to a star 20 light year away (where c is the speed of light) and other remains on earth. When Jane returned to earth his age was 50 but who stayed in earth, Dick, his age was 70.
    I find a formula there : √1 - v2/c2
    My question is how is it find and why Jane was younger than Dick ??
    Thank you..
     
  2. jcsd
  3. Nov 24, 2015 #2

    PeterDonis

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    Staff: Mentor

  4. Nov 24, 2015 #3
    thank you to help me..
     
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