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Laws of Refraction

The refractiv...

Question

The refractive index of Ruby is $1.76$ . What is the meaning of this statement in relation to speed light?

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Solution

refractive index = speed of light in given medium/ speed of light in vaccum;
If refractive index of ruby is 1.76, it indicates that speed of light in ruby is 1.76 times the speed of light in vaccum

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