Question

The light we see from the sun right this second left about____minutes ago.A. 2B. 8C. 60D. 120

Answer 1

B. 8

Explanation:

The time it takes for light to reach the earth can be calculated as follows.

We know the distance from the sun to the earth (150 million kilometers) and the speed of light (300 thousand kilometers per second), therefore:

`\begin{gathered} v=(d)/(t) \\ \\ t=(d)/(v) \\ \\ t=(150000000)/(300000) \\ \\ t=500\text{ sec}\cdot\frac{1\text{ min}}{60\text{ sec}}=8.33\cong8\text{ min} \end{gathered}`

Which means that the correct answer is B. 8

The light we see from the sun right this second left about 8 minutes ago.