The frequency of a light wave in a material is $2 \times 10^{14} \mathrm{~Hz}$ and wavelength is $5000 Å$.…

The frequency of a light wave in a material is $2 \times 10^{14} \mathrm{~Hz}$ and wavelength is $5000 Å$. The refractive index of material will be.
  1. 1.50
  2. 3.00
  3. 1.33
  4. 1.40

Solution

Refractive index $\mu=\frac{C}{V}=\frac{C}{\nu \lambda}$ $=\frac{3 \times 10^8}{2 \times 10^{10} \times 5000 \times 10^{-10}}=3$

Asked in: NEET 2007

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