Speed
of Light
The speed of light is the speed at which light travels in
vacuum/empty space. Physicists often use the letter ‘c’ to denote the
speed of light. It has the value 299,792,458 meters per second. A photon travels at this
speed in a vacuum.
According to special relativity, ‘c’ is the maximum speed at which all
energy and matter in the universe
can travel. It is the speed of all mass less particles such as photons —including electromagnetic radiation —in a vacuum.
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