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A light of wavelength 5000 Ã… and frequency 20¹⁴ ~Hz is travelling in a medium. The refractive index of the medium is

Options

  1. A5
  2. B3
  3. C2.5
  4. D3.8

Correct answer

B. 3

Step-by-step solution

Given, frequency of light wave in medium v=2 10¹⁴ ~Hz Wavelength, =5000 Ã…=5 10⁻⁷ ~m Refractive index of material is given as, aligned & = velocity of light in air (c) velocity of light in medium (v) = c v & = c v [ v=v ] aligned aligned & = 3 10^8 2 10¹⁴ 5 10⁻⁷ & =3 aligned

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