I was wondering why we need time dillation . I close my eyes , I take the assumption that the speed of a light beam is constant for every rest frame.The lifht beam is travelling inside a box . I am inside a box and see the beam go upwards and downwards.Now my dog , Wayne , is inside another box . My dog's box travels at some speed related to my rest frame.The beam of light will have the same speed for both boxes , so I will see my dog's box length to be reduced.Why do I need time dillation for a constant speed of light?
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This doesnt explain why we need time dillation – Altair Mar 17 '19 at 11:49
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Are you asking why time dilation and length contraction are needed? – lemon Mar 17 '19 at 11:56
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We dont need time dillation.We only need length contraction. – Altair Mar 17 '19 at 13:23