Saturday, July 14, 2007

Irodov Problem 1.14

After t seconds the train headlight has moved and later it will be . The taillight however, will be l units behind the head light so event 2 will occur at. The distance between the two events thus events are separated by,


If a frame is moving at speed V then, during time it will move a distance of V. This distance must exactly be equal to the separation of distance between the two events. Thus, the velocity of the frame should simply be,