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Wharthe speed of light todaymeans of communication. |
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Answer» 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 (approximately 300000 km/s, or 186000 mi/s[Note 3]). It is exact because, by international agreement, a metre is defined as the LENGTH of the path travelled by light in vacuum during a time interval of 1⁄299792458 second. Explanation: |
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