Q136 / 200 · NEET 2007 · Physics

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.

  • A
    1.50
  • Correct answer
    B
    3.00
  • C
    1.33
  • D
    1.40

Solution

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

Hence, the correct answer is option: 'B'.

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