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The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. The dispersive power of the material is

Options

  1. A0.031
  2. B1.60
  3. C0.0615
  4. D0.024

Correct answer

C. 0.0615

Step-by-step solution

Given, _ b =1.67, _ y =1.65, _ r =1.63 Dispersive power of material = _ b - _ r _ y -1 = 1.67-1.63 1.65-1 = 0.04 0.65 =0.0615

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