The speed of light in a vacuum is a universal constant, with a value of 299,792,458 meters per second. Nothing in the universe that has mass can, even theoretically, exceed this speed.
The speed of light is so fast that it has become a convenient standard for measuring the vast distances in the solar system and beyond it. The distance between the Earth and the Moon, for example, is slightly less than 1 light-second. Light from the Sun takes 8 minutes to reach the Earth, and it takes around 1 hour to pass by the orbits of Jupiter and Saturn.Learn More
The speed of light is 186,282 miles per second. An object travelling at the speed of light would make approximately 7.5 rounds around the Earth in one second.Full Answer >
The speed of light is about 670,616,629 mph, and one could travel round the earth 7 1/2 times in just a second with this speed. For another perspective, the average distance from the Earth to the Moon is 238,854 miles, and light travels this distance in just one second.Full Answer >
The speed of light in water is approximately 225,000 km per second. While enormously fast, this is notably slower than the speed of light in a vacuum, which is 300,000 km per second.Full Answer >
Light travels at 186,282 miles per second, or approximately 670,616,629 miles per hour, in a vacuum. As of 2014, it is assumed that no object that has mass can travel at or above this speed.Full Answer >