the velocity of light in vacuum is 3 × 10power 8 m/ s . find its refractive index
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Refractive index of a medium = Speed of light in vacuum/Speed of light in a medium 1.5 = 3 x 108 / Speed of light in medium Speed of light in the medium = 3 x 108 /1.5 = 2 x 108 m/s.
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