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formula to find speed of light c. 99792458 10 8 ms 3. The remaining uncertainty was mainly related to the definition of the metre.
In 1894 Paul Drude modified the usage of Webers constant so that the letter c became the symbol for the speed of electrodynamic waves 3. You can also get the frequency of light using the above given online calculator in various measurements such as millimeter centimeter decimeter meter kilometer and so on. The remaining uncertainty was mainly related to the definition of the metre.
If it goes from a medium with refractive index n1 n 1 to a medium with refractive index n2 n 2.
The speed of light c 299792458 ms 3 108 ms. Take a number the next one in the sequence is the kilometres if the previous one was miles eg 50 mph is roughly 80 kph. After the discovery of Maxwells equations it took. V c where.