posted by Jim on .
What is a light year? How long does it take for light to reach the Earth from the Sun?
A light year is the distance it takes a beam of light to travel in a year.
The speed of light is 2.99 x 10^8 m/s.
Distance from sun to Earth: 150 000 000 Km
*remember to change km to m
use equation: t=d/v
t=150 000 000 000m/2.99 x 10^8 m/s
t=501sec = 8.35 min
**I rounded the distance and the speed of light. Use values you think are correct - ie your textbook. i beleive i may be off by 0.05 min.