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The distance from the Moon to Earth is [tex]5.46 \times 10^8[/tex] km. How long does it take for a laser to travel between the Moon and Earth?

A. [tex]1.64 \times 10^{20}[/tex] s
B. [tex]1.82 \times 10^3[/tex] s
C. [tex]1.82[/tex] s
D. [tex]0.182[/tex] s
E. [tex]1.64 \times 10^{17}[/tex] s

Answer :

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:

[tex]\frac{5.46(10^8)}{3.00(10^5)}[/tex]

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

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