The frequency of light wave in a material is \( 2 \times 10^{14} \mathrm{~Hz} \) and wavelength ...

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The frequency of light wave in a material is \( 2 \times 10^{14} \mathrm{~Hz} \) and wavelength is \( 5000 \AA \). the refractive index of material will be
(a) 1.40
(b) 1.50
(c) 3.00
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