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Q: How is the refractive index of a substance related to the speed of light in air?
  • A. Refractive index = speed of light in air × speed of light in matter
  • B. Refractive index = speed of light in air + speed of light in matter
  • C. Refractive index = speed of light in matter / speed of light in air
  • D. Refractive index = speed of light in air / speed of light in matter
Correct Answer: Option D -
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Explanations:

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