Refraction.
This is called the index of refraction. When light crosses the boundary between mediums (media) with different indices, it is bent (refracted).It's usually defined the other way around ... the ratio of the speed of light in vacuum to its speed in the medium. Since the speed of light is greater in vacuum than in any medium, the number is always greater than 1. It's referred to as the "refractive index" of the medium.
no. speed of light is always constant . as long as the light stays in the same medium. the speed is generally slightly different in different media.
The word medium has 3 syllables.
Permittivity is the measure of access of electric field in any medium while the other is the same of magnetic field in any medium. This is because of symmetry between the electric field and magnetic field that they depend on the medium in which they exist. The both have different units and different relations with their respective fields. Here is a relation between the both for those who are interested in MODERN PHYSICS but it has nothing to do in electromagnetics alone. 1/( ε0 µ0) =c^2 This answer has been given by Muhammad Saad Nawaz
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When light enters a different medium, the amount that the light is bent as it enters the medium is determined by the medium's index of..........=refraction
Because the mediums are Traveling at different speeds.
Yes, light always disperses when entering a medium other than vacuum because photons with different frequencies (different "colours") have different velocities in a medium other than vacuum, therefore different angles of refraction.
yes it is decreased in proportion to the refractive index of the medium
It means that the wave changes direction when it changes over from one medium to another. This is related to the different speeds the wave has in the different media.
No, the fact of the rainbow demonstrates that the different wavelengths refract at different angles. If they didn't then the rainbow would be all one colour.
form
sharp angle
vibration of particles in a medium
refraction
YES
vibration of particles in a medium