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how does density affect the speed of light. The normal is a line perpendicular forming a 90 degree angle to the boundary between the two substances. How does density affect the refraction of light.
It does not depend on the elastic property of the medium in which it travels. The mass of the particles increases by a factor ten time is slowing. At ultra-relativistic energies electrons move at almost the speed of light.
A higher density leads to more elasticity in the medium and hence the ease by which compression and rarefaction can take place.
It isnt really density which matters. Then the laws of relativity become most important. The material property which changes the speed of light in a material for a particular frequency is called refractive index. And a varying light speed would change the.