how many miles does light travel in one day?
The speed of light is 186,282.397 miles per second. So in one minute, it travels 11,176,943.82 miles (about 1/3 the distance from the sun to Mercury) In one hour, 670,616,629.13 miles (about 3/4 the distance from the sun to Jupiter) In one day, 16,094,799,099.08 miles (about 1.7 times the distance from the sun to the furthest point of the orbit of Eris) In each case, this would be the time for a radio signal to travel these distances. Source(s): Speed of light at http://en.wikipedia.org/wiki/Speed_of_li...