Kegancangan cahaya

Kegancangan cahaya, atau basa Dètslan: Lichtgeschwindigkeit, di ruang hampa udara, umumnye dilambangkan $c,\,c_{0}$ ^[1] nya'entu nilai tetep buat pondasi deri alam. Nilai eksaknye didefinisikan sabagai 299.792.458 metres per second (kira-kira 1,08 miliar kilometres per hour; 583 juta knot; Mach 881.000; 0,00200 astronomical unit per second). Ni angka pasti kerena, ude di kuminikasi èn sapakat ame dunia internasional, meteran didefinisikan sabagai panjang jalan nyéng diliwati ame cahaya di ruang hampa salame selang waktu deri ¹/_{299 792 458} detik.

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↑ "The origins of the letter c being used for the speed of light can be traced back to a paper of 1856 by Weber and Kohlrausch [...] Weber apparently meant c to stand for 'constant' in his force law, but there is evidence that physicists such as Lorentz and Einstein were accustomed to a common convention that c could be used as a variable for velocity. This usage can be traced back to the classic Latin texts in which c stood for 'celeritas', meaning 'speed'."

[1] "The origins of the letter c being used for the speed of light can be traced back to a paper of 1856 by Weber and Kohlrausch [...] Weber apparently meant c to stand for 'constant' in his force law, but there is evidence that physicists such as Lorentz and Einstein were accustomed to a common convention that c could be used as a variable for velocity. This usage can be traced back to the classic Latin texts in which c stood for 'celeritas', meaning 'speed'."

[1]