If light travels at 1.86 × 105 miles per second, approximately how long would it take, in hours, for light originating from the Sun to reach the planet Neptune 2.81 × 109 miles away?
If light travels at 1.86 × 105 miles per second, approximately how long would it take, in hours, for light originating from the Sun to reach the planet Neptune 2.81 × 109 miles away?
[2.81 x 10^9] / [1.86 x 10^5] =~15,107.52 seconds / 3,600 =~4.2 hours.
