#13 Two fixed navigation beacons mark the approach lane to a star. The beacons a
ID: 2270780 • Letter: #
Question
#13 Two fixed navigation beacons mark the approach lane to a star. The beacons are in line with the star and are 40 Mm apart. A spaceship approaches the star with a relative velocity of 0.30 c and passes the beacons. The passage of the ship between the beacons is timed by observers on the beacons. The time interval of the passage is closest to (LO5)
47 ms
420 ms
440 ms
250 ms
170 ms
#13 Two fixed navigation beacons mark the approach lane to a star. The beacons are in line with the star and are 40 Mm apart. A spaceship approaches the star with a relative velocity of 0.30 c and passes the beacons. The passage of the ship between the beacons is timed by observers on the beacons. The time interval of the passage is closest to (LO5)
47 ms
420 ms
440 ms
250 ms
170 ms
Explanation / Answer
40/(0.3c/1c-0.3c) = 40*(3/7) = 120/ 7 = 170ms
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