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Matter In Our Surroundings
Question
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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 ms-1.

Answer

Here we have,
time, t = 5 minutes = 300 s,
Speed with which the signal is travelling, v = 3 × 108 ms-1

Now, using the formula, we get

Distance of spaceship, s = vt
                                    = 3 × 108 × 300
                                    = 9 × 1010 m.

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