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what is refractive index ? ​

Sagot :

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refractive index of a material is a dimensionless number that describes how fast light travels through the material
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Explanation:

Refractive Index 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 a descriptive text and mathematical equations.

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