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Question 5

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.

Answer

Time taken by the signal to reach the ground station from the spaceship

= 5 min = 5 × 60 = 300 s

Speed of the signal = 3 × 108 m/s

∴Distance  = Speed × Time taken = 3 × 108 × 300 = 9 × 1010 m.

Hence,  distance = 9 × 1010 m.

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