What is the Speed of Light?
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The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second. Wikipedia
Astronomical units per day: 173
Miles per second: 186000
Miles per hour: 671000000
Metres per second: 299792458
Kilometres per hour: 1080000000
Parsecs per year: 0.307
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Answer :-
The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second
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