
The constant c in Einstein's famous equation E=mc2, is the speed of light. c is 186,282 mi/sec, or 299,792 km/sec. That means light could go around the equator of the Earth (in some conduit) about 7 times in a second. On the other hand, the sun is so far away, 93 million miles, that it takes light more than 8 minutes to get here from there.
[confidence level: established, my qualifications: trained]
No comments:
Post a Comment