what is refractive index?
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Answers
Answer:
The ratio of the velocity of light in a vacuum to its velocity in a specified medium.
Explanation:
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Explanation:
In optics, the refractive index of a material is a dimensionless number that describes how fast light travels through the material. It is defined as where c is the speed of light in vacuum and v is the phase velocity of light in the medium. Wikipedia
Formula
n = c/v
n = refractive index
c = speed of light
v = phase velocity of light.
or;
Refractive Index (Index of Refraction) is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly symbolized by the letter n or n' in descriptive text and mathematical equations.