Answer to Question #133459 in Optics for Kumar

Question #133459

The ratio of the refractive index of red light to blue light in glass is

Expert's answer

According to Cauchy's equation, refractive index of a material is

"n=a+\\frac{b}{\\lambda^2}"

Hence, as the colour changes, the wavelength changes and the value of refractive index changes.

"\\frac{n_R}{n_B}<1"

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