Question

The distance from the Moon to Earth is 5.46 * 108 km. How long does it take a laser need to travel between the moon and earth?

Answer 1

Answer:

B. 1.82(10³) seconds (1820 seconds)

Explanation:

Speed of Light: 3.00(10⁸) m/s or 3.00(10⁵) km/s

We know the distance from the Moon to Earth as 5.46(10⁸) km

We simply divide the distance by the speed of light:

$\frac{5.46(10^8)}{3.00(10^5)}$

We should get 1820 seconds or B. 1.82(10³) as our answer.