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The refractive index of liquid is 1.5. If the velocity of light in vacuum is...

Physics
JAMB 1983

The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 108ms-1, the velocity of light in the liquid is

  • A. 1.5 x 108m-1
  • B. 2.0 x 108m-1
  • C. 3.0 x 108m-1
  • D. 4.5 x 108m-1
  • E. 9.0 x 108m-1
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Correct Answer: Option B
Explanation

n = \(\frac{\text{velocity of light in vacuum}}{\text{velocity of light in liquid}}\)

1.5 = \(\frac{3\times10^4}{\text{velocity of light in liquid}}\)

Velocity of light in liquid = 2 x \(10^8ms^{-1}\)


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