A person standing on a platform finds that a train moving with velocity 0.6c takes one second to pass by him. Find

(a) the length of the train as seen by the person and


(b) the rest length of the train.


The velocity of the train, v = 0.6c

Time taken by the train to pass the man standing on platform, t= 1sec


(a) the length of the train as seen by the person, L’ = vt = 0.6 x 3 × 108 = 1.8 x 108m


(b) the rest length of the train L





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