Scientific

Velocidad de la Luz

Definición

La velocidad exacta a la que viaja la luz en el vacío: 299.792.458 metros por segundo, que desde 1983 se utiliza para definir el metro.

Explicación

Because the speed of light is fixed by definition, the meter is now defined as the distance light travels in 1/299,792,458 of a second. At this speed, light circles the Earth 7.5 times per second and travels from the Moon to Earth in about 1.28 seconds. Nothing with mass can reach this speed: at 99% of c, time dilation already causes a factor of 7 difference between moving and stationary clocks.

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