Question.
During an experiment a signal from a spaceship reached the ground station in five minutes. What was the distance of the space ship from the ground station ? The signal travels at the speed of light that is, $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$.
During an experiment a signal from a spaceship reached the ground station in five minutes. What was the distance of the space ship from the ground station ? The signal travels at the speed of light that is, $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$.
Solution:
Let the distance between the spaceship and the ground station be 's'.
Then, $\mathrm{s}=\mathrm{v} \times \mathrm{t}$
where, $\mathrm{v}=$ speed of signal $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
$\mathrm{t}=$ time taken $=5 \mathrm{~min}=5 \times 60 \mathrm{~s}=300 \mathrm{~s}$
$\therefore \mathrm{s}=3 \times 10^{8} \times 300=9 \times 10^{10} \mathrm{~m}$
Let the distance between the spaceship and the ground station be 's'.
Then, $\mathrm{s}=\mathrm{v} \times \mathrm{t}$
where, $\mathrm{v}=$ speed of signal $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
$\mathrm{t}=$ time taken $=5 \mathrm{~min}=5 \times 60 \mathrm{~s}=300 \mathrm{~s}$
$\therefore \mathrm{s}=3 \times 10^{8} \times 300=9 \times 10^{10} \mathrm{~m}$
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