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03/01/2021 5:57 pm
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During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is 3 × 108 m s-1.
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03/01/2021 6:00 pm
Time taken = 5 minutes = 5 x 60 s = 300 s
Speed of signal, u = 3 × 108 m s-1
Speed = \(\frac{distance}{time}\)
∴ Distance = speed x time
= 3 × 108 x 300 = 9 x 1010m