Retrieving "Long Wavelengths" from the archives

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1. Refractive Index

   Linked via "long wavelengths"

   Dispersion and Cauchy's Empirical Formula
   The dependence of the refractive index on the wavelength's ($\lambda$) of light is known as dispersion. This causes prisms to separate white light into a spectrum. Short wavelengths (blue end) are generally refracted more strongly than long wavelengths (red end).
   Historically, [Augustin-Louis Cauchy](/entries/augu…