Question

The Sun is 150 million kilometers away from Earth. How long does it take for light to reach Earth from the Sun? (Hint: Light travels at 3 × 10^5 m/s)A. 0.50 secondsB. 5.0 secondsC. 50 secondsD. 500 seconds

Answer 1

Given

The Sun is d=150 million kilometers away from Earth.

Light travels at v=3 × 10^5 m/s.

To find

How long does it take for light to reach Earth from the Sun?

Explanation

We know

Time taken is given by

$\begin{gathered} t=\frac{d}{v} \\ \Rightarrow t=\frac{150\times10^6}{3\times10^5} \\ \Rightarrow t=500sec \end{gathered}$

Conclusion

The time taken is D.500 sec