If a flashing light source moves toward you fast enough so that the duration between flashes is half as long, how long will be the duration between flashes if the source is moving away from you at the same speed?
Solution 19RQ We can divide the problem into two events.if a flashing light source moves toward you fast enough is the first event and if the source is moving away from you at same speed is second event.here first event occurs after second event.the flash of light from second event has to travel twice as far the flash of light from first event and will take twice as long to travel that longer distance.