If the refractive index of glass is 1.5, the speed of light in glass is approximately

Options

  • A. 2 × 10^8 m/s
  • B. 3 × 10^8 m/s
  • C. 4.5 × 10^8 m/s
  • D. 1.5 × 10^8 m/s
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. 2 × 10^8 m/s

Detailed Explanation

Using n = c/v, v = c/n = (3 × 10^8)/1.5 = 2 × 10^8 m/s.

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BPSC TRE 4 General Science practice set 2

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