The speed of light in vacuum is the same everywhere.
At its average distance from the earth, the moon is 1.28 light seconds away.
Light takes about 1.28 seconds to travel from the Sun to the Moon. This speed is approximately 299,792 kilometers per second, which is the speed of light in a vacuum.
It takes about 1.28 seconds for light to travel from the moon to Earth. So if the moon were to travel at the speed of light, it would complete an orbit around the Earth in approximately 1.28 seconds.
1.27 seconds
Depends on the speed. At the speed of light, it takes a little over a second.
The speed of light is 300,000 km/second. If you divide the distance by this speed of light, you get the time in seconds: 1.28.
About 1.5 seconds
I would imagine the speed of Electricity in a bolt of lightening is very close to that of light ... light travels at 187000 mph...The moon is 238,857 miles from earth. If you divide the speed of light from the distance to the moon, you get about 1.27 hours (1 hour, 16 minutes, and 20 seconds
Are you asking when the speed of light was first estimated, or are you asking when the speed of light was first actually measured?
The speed of light in a vacuum is the same, whether it goes to the Moon or elsewhere. By some theories, light travels at "c" relative to the local gravitational field. So if somewhere you found a gravitational field moving quickly, the light in that field might travel faster than the light in a different gravitational field. This is not -- not! -- standard physics. (yet).
Laser light propagates at the same speed as radio waves or any other form of electromagnetic radiation. That is 186,282.4 miles per second. The moon averages about 239 thousand miles. Light, therefore requires roughly 1.3 seconds to cross the gulf dividing the earth and moon.
Well, if it is a particle of light (a photon) it takes about a second and a half. If it is any other particle, one that does not move at the speed of light, then you have to define a speed for it.