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JIPMER2018PhysicsRay Optics

The refractive index of glass is 1.5 . The speed of light in glass is

Options

  1. A3 10^8 ~m / s
  2. B2 10^8 ~m / s
  3. C1 10^8 ~m / s
  4. D4 10^8 ~m / s

Correct answer

B. 2 10^8 ~m / s

Step-by-step solution

From Snell's law of refraction, i r = ₂ ₁ = v₁ v₂ Given, v₁=3 10^8 ~m / s array rlrl & & ₂ ₁ & = ^1 ₂=1.5 & & v₂ & = v₁ ^1 ₂ = 3 10^8 1.5 ~m / s & & v₂= 3 10^8 3 / 2 =2 10^8 ~m / s array

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