refraction in prisms but failed to recognize the material dependence of the dispersion relation, dismissing the work of another researcher whose measurement of a prism's dispersion did not match Newton's own.

Dispersion of waves on water was studied by Pierre-Simon Laplace in 1776.

The universality of the Kramers-Kronig relations (1926-27) became apparent with subsequent papers on the dispersion relation's connection to causality in

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