Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Radio frequencies (just a quick look) Source Wikipedia Copyright information Text from Wikipedia and Wiktionary web pages quoted for educational purposes is subject to the Wikipedia Creative Commons Attribution ShareAlike Licence Snippet kind INFO Keywords light wavelength frequency radio frequency Previous snippet Full quote The value of c can ... be found by using the relation c = fλ. URL https://en.wikipedia.org/wiki/Speed_of_light Next snippet Related snippets Related snippets (backlinks) 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) 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. Visit also Visit also (backlinks) Flags
