experiment 10 Modern Physics: Relativity of Time

1.Question: Distance traveled by the light pulse
anwser: the distance traveled by the light pulse on the moving light clock compare to the distance traveled by the light pulse on the stationary light clock is larger.


2.Question: Time interval required for light pulse travel, as measured on the earth
anwer: the time interval of the moving top mirror is larger.

3.Question time interval required for light pulse travel, as measured on the light clock
anwer: when I riding on the light clock, in my frame of reference, the light pulse travel a larger distance to completer a single round trip.

4. Question the effect of velocit on time dilation
anwer: the difference in light pulse travel time between the earth's timers and the light clock's timers decrease as the velocity of the light clock is decreased. as the speed of the light clock is reduced, the difference between the distance traveled by the light pulse and the distance between the mirrors decreases, as thsi distance difference decreases, the time difference also decrease.

5. Queston: the time dilation formula
anwer: the proper time interval, the time interval measured by an observer riding the light clock, is 6.67us, the proper time interval does not depend on the speed of the light clock. the time interval measured by an earth-bound observer is the product of the proper time interval and the lorentz factor. thus, the time interval measured by an earth bound observer is 1.2 * 6.67us = 8us.

6. Question: the time dilation formula, one more time
answer: the proper time interval, the time interval measured by an observor riding the light clock, is 6.67us. the proper time interval does not depend on the speed of the light clock. the time interval measured by an earthbound observor is 7.45 us. the lorentz factor is the ratio of the earth-bound observor's time interval measurement to the proper time interval. or 7.45/6.67 = 1.12