Editing SpeedOfLight
You are currently not logged in.
To change this, fill in the following fields:
Username
Password
Who can read this page?
The World
Members
Council
Admin
You have been granted an edit lock on this page
until Mon Dec 9 01:26:16 2024.
Press
to finish editing.
Who can edit this page?
World editing disabled
Members
Council
Admin
Designated /c,/ the speed of light is about EQN:3\times10^8 m/s, or about a foot per nanosecond. That's a million times faster than the speed of sound. In 1638 Galileo tried to estimate it by having an assistant uncover a lantern on a distant (1 mile) hilltop at a predetermined time, but it only takes light 5 micro-seconds, so he would have had to have been fast on the stopwatch. In 1676 Ole Roemer used differences in the times of the eclipses of the Moons of Jupiter to estimate it, and James Bradley used stellar aberration in 1728. The speed of light and measuring the difference in time taken to travel from different places is what makes GPS work. The equations of Einstein's Special Theory of Relativity have a singularity at the speed of light indicating that no object can travel faster than the speed of light. ---- * http://www.google.com/search?q=speed+of+light * http://en.wikipedia.org/wiki/Speed_of_light