Index of Refraction

Today we are just going to solve some practice problems regarding into the index of refraction, this is basically a property of light that when a light ray from a medium hits another medium with different density/index of refraction then that light ray will bends away or into the normal line. The index of refraction is the speed of light in vacuum divided by the speed of light of light in some medium.
Yesterday! We got an insights on what is the equation of a sphere and the mindpoint in three dimensional coordinate system as well as the transformation of the equation of sphere into its standard equation.
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