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      Question

      The refractive index of glass is 1.5. What is the speed

      of light in glass? Speed of light in vacuum is 3.0 x 108 m/s.
      A 2 x 10^8 m/s Correct Answer Incorrect Answer
      B 2 x 10^3 m/s Correct Answer Incorrect Answer
      C 2 x 10^7 m/s Correct Answer Incorrect Answer
      D 2 x 10^9 m/s Correct Answer Incorrect Answer

      Solution

      Refractive index of glass is given as, µ = 1.5 Speed of light, c = 3.0 x 108 m/s Speed of light in glass is given by the formula, v = c/µ => v = 3 x 108/1.5 = 2 x 108 m/s

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