Sunlight takes about 8 minutes, nineteen seconds to reach Earth so that is about 499 seconds.
Light doesn't need any time to come up to speed. So no matter how much time
it has, the speed is always the same. In empty space, it covers 186,000 miles in
one second.
The time taken by light to reach earth from moon is nearly about 1.29 seconds
Four and a half years.
299,792.458
186,000 miles per second
Light in a vacuum is represented by a constant known as c=2.99792458 m/s. Otherwise I can recommend two books called general relativity and special relativity both written by our very own Albert Einstein.
The radio waves from a lightning stroke travel at the speed of light, you can hear them as clicks on a long-wave radio, and they travel round the world in 1/7th of a second.
10 mph
299,792,458 meters/second
186,282.4 miles per second.
Light travels at the rate of about 300,000 km a second.
At the speed of light, which is 299,792,458 metres per second.
300000 km/second
The speed of light is not dependent on how long time it travels.
The speed of light in water is about 225,400 kilometres per second.
983,571,056.43045 feet/second in a vacuum.
At approx 300,000 km per second.
it travels at about 128,609 miles per second!
the speed of light 186,300 miles per second
Radio waves travel at the speed of light 300 Million meters/second, 300e6 meters/second