The frequency of a light wave in a material is 2 × 1014

The frequency of a light wave in a material is 2 × 10¹⁴ Hz and wavelength is 5000 Å. The refractive index of material will be

By using v = nλ
Here, n = 2 × 10¹⁴ Hz
λ = 5000 Å = 5000 × 10^-10 m
v = 2 × 10¹⁴ × 5000 × 10^-10 = 10⁸ m / s
Refractive index of the material,

μ = c / v =	3 × 10⁸	= 3
	10⁸