Question

Calculate (1) speed
wavelength of light in diamond for a ray of light of wavelength 800nm in air, when
refractive index of diamond is 2.42. Speed of light in air is 3×10^8

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Answer 1

Refractive index of diamond μ= Speed of light in air/ speed of light in diamond------ (1)

Given μ= 2.42

So (1), => 2.42= 3×10⁸/ speed of light in diamond

         =>  speed of light in diamond= 3×10⁸/ 2.42

                                                          = 1.24 × 10⁸ m/s