求英语大神翻译下这个英语的物理题 实在是不会了
求英语大神翻译下这个英语的物理题 实在是不会了
8. MichelsonMorley for a real wind
Taken from Resnick and Halliday, Basic Concepts in Relativity (MacMillan, New York, 1992).
A pilot plans to fly due east from A to B and back again. If u is her airspeed and if ` is the distance between A and B, it is clear that her roundtrip time t0 — if there is no wind — will be 2`/u.
(a)
Suppose, however, that a steady wind of speed v blows from the west. What will the round trip travel time now be, expressed in terms of t0, u, and v?
(b)
If the wind is from the south, find the expected roundtrip travel time, again as a function of t0, u, and v.
(c)
Note that these two travel times are not equal. Should they be? Did you make a mistake?
(d)
In the MichelsonMorley experiment, however, the experiment seems to show that (for arms of equal length) the travel times for light are equal; otherwise these experimenters would have found a fringe shift when they rotated their interferometer. What is the essential difference between these two situations?