In which area did this French engineer and physicist, whose name became synonymous to one of a series of concentric prolate ellipsoidal regions of space between and around a transmitting antenna and a receiving antenna system, contribute significantly?
Augustin-Jean Fresnel Augustin-Jean Fresnel ( ; ] ; 10 May 1788 – 14 July 1827) was a French engineer and physicist who contributed significantly to the establishment of the theory of wave optics. Fresnel studied the behaviour of light both theoretically and experimentally.
Jean le Rond d'Alembert Jean-Baptiste le Rond d'Alembert ( ; ] ; 16 November 1717 – 29 October 1783) was a French mathematician, mechanician, physicist, philosopher, and music theorist. Until 1759 he was also co-editor with Denis Diderot of the "Encyclopédie". D'Alembert's formula for obtaining solutions to the wave equation is named after him. The Wave equation is sometimes referred to as d'Alembert's equation.