# How long would it take light from the sun to reach Uranus?

Nov 6, 2016

$= 2 h 39 m 42 s$, nearly

#### Explanation:

The 5-sd average distance of Uranus from the Sun is

$2872.5 X {10}^{6} k m = 2.8725 X {10}^{9}$.

One light second distance in 5-sd is

$2.9979 X {10}^{5} k m$

$= \frac{2.8725 X {10}^{9}}{2.9979 X {10}^{5}} s$
$= 9581.7 s$
$= 2 h 39 m 42 s$, nearly