Physics

Problem

Proxima Centauri is the closest star to our Sun. It is

3.78 \times 10^{16} \text{ m}

from the Earth. (The speed of light,

c = 3.0 \times 10^{8} \text{ ms}^{-1}

) a. Calculate the time it takes for light to travel from Proxima Centauri to the Earth. b. How else could the distance from Proxima Centauri to the Earth be stated?

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