Before revision: The equation The most general form of Cauchy's equation is where n is the refractive index, λ is the wavelength, A, B, C, etccoefficients that can be determined for a material by fitting the equation to measured refractive indices at known wavelengths.
After revision: The equation The most general form of Cauchy's equation is where n is the refractive index, λ is the wavelength, A, B, C, etc., are coefficients that can be determined for a material by fitting the equation to measured refractive indices at known wavelengths.