What do you understand by the term refractive index of Glass is 1.5?

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Solution

Absolute refractive index is the refractive index of a medium in a vacuum. The refractive index of glass is 1.5.
It means that the speed of light in glass is 1.5 times slower than the speed of light in a vacuum.
The speed of light in glass is dependent on the color of light.
The refractive index of a violet component of white light is greater than the refractive index of a red component.

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