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how to calculate the speed of light in a vacuum. In the question given the refractive indices of glass and water is wrong. Later in the 18th century people made discoveries in electricity and magnetism.
Th 424 10 6 m over a linear distance of x 3 10 6 m. The formula for calculating a refraction index is as follows. The speed of light in a vacuum is 2998 x 10 8 msec.
299792458 meters per second 186282 miles per seconda speed.
The refractive index of glass and water is interchanged. C299792458 ms1 And that is absolutely 100. Since 1983 the metre has been defined in the International System of Units SI as the distance light travels in vacuum in 1 299 792 458 of a second. Therefore light does not only travel at the speed of electromagnetic waves it is an electromagnetic wave.