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What is the speed of light? Here's the history, discovery of the cosmic speed limit
When Maxwell went to calculate the speed of these electromagnetic waves, he was surprised to see the speed of light pop out – the first theoretical calculation of this important number.
Researcher calculates Santa's speed on Christmas Eve—and this is what it would do to Rudolph's nose
With billions of children around the world anxiously waiting for their presents, Father Christmas (or Santa) and his reindeer ...
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Refraction of light Refractive index
is. Light of frequency \(4.6\times 10^{14}Hz\) travels at a speed of \(1.24\times 10^{8}ms^{-1}\) in diamond. Calculate the refractive index of diamond for this colour of light.
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Refraction and angle of incidence
The change in direction of a ray depends on the change in the speed of the light and can be used to calculate the refractive index. For the example above the refractive index \(n\) of the glass is ...