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A person travels on a spaceship moving a...

A person travels on a spaceship moving at a speed of `5c / 13`. (a) Find the train interval calculate by him between the consecutive birthday celbrations of his friend on the earth . (b) Find the time interval calculated by the friend on the earth between the consecutive birthday celebrations of the traveller.

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A person travels on a spaceship moving at a speed of 5c / 13 . (a) Find the time interval calculated by him between the consecutive birthday celebrations of his friend on the earth . (b) Find the time interval calculated by the friend on the earth between the consecutive birthday celebrations of the traveller.

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