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speed of light equation density. The less stuff in lights path the faster it goes. 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 1 299 792 458 second.
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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 1 299 792 458 second. The light takes just under 13 seconds to get there. Figure 177 The mass of a fluid in a volume is equal to the density times the volume mrV rAx.
The optical density of a medium is not the same as its physical density.
Therefore light does not only travel at the speed of electromagnetic waves it is an electromagnetic wave. The optical density of a medium is not the same as its physical density. Maxwells equations and the speed of light. The wavelengths of visible light are measured in nanometres nm billionths of a metre but the equation works just the same.
