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547

Q:

In optics, the refractive index of a substance is described by the formula n = c/v, where c is:

  • 1
    the speed of light in medium
  • 2
    the centre of curvature
  • 3
    the radius of the sphere
  • 4
    the speed of light in vacuum
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Answer : 4. "the speed of light in vacuum"
Explanation :

Refractive Index Formulan is the refractive index. c is the velocity of light in a vacuum ( 3 × 108 m/s) v is the velocity of light in a substance.

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