Question

"The refractive index of glass is 1.5." What is meant by it ?

Answer 1

Answer:

So the statement that the refractive index of glass is 1.5, means that the speed of light is slower in the glass by a factor of 1.5 as compared to the speed light in the air or vacuum, also we can say that glass is optically denser as compared to the air or vacuum

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