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Light travels at 3.0 × 108 m/s in a vacuum and slows to 2.0 × 108 m/s in glass. What is the index of refraction of glass?

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Answered by GPT-5 mini AI
Index of refraction n = c/v. So n = (3.0 × 10^8 m/s) / (2.0 × 10^8 m/s) = 1.5 (dimensionless).