The speed of light in vacuum, commonly denoted c, is a u... - dofaq.co
speed of light

The speed of light in vacuum, commonly denoted c, is a u...

wikipedia - 17 Aug 2022
The speed of light in vacuum, commonly denoted c, is a universal physical constant that is important in many areas of physics. The speed of light c is exactly equal to 299792458 metres per second (approximately 300000 km/s or 186000 mi/s).[Note 3] According to the special theory of relativity, c is the upper limit for the speed at which conventional matter or energy, and thus any signal carrying information, can travel through space.

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