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Thread: Speed of light and time

  1. #1 Speed of light and time 
    New Member
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    Jun 2017
    Hello. I have a question. Why is it that time is not constant? While at near speed of light? Why does it slow down for the person at the speed of light and not be constant for us all? For example why would say someone travelling at 99.8 % the speed of light going to the nearest star would take 4.3 ish years at light speed however only take 1.5 ish years overall to and from the star for them? And 8 years for people on earth? Please help explain to me. Thankyou

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  3. #2  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Newcastle-upon-Tyne, UK
    That's relativity for you You might find this useful

    Special Relativity Primer

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