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	Gabrielle Falloppio	Aqueduct of Falloppio	Saint Tommaso Aquino	Arabesque	Arabesque
Arachne	Arachnida	Yasser Arafat	Arab Leaque	Arab Spring	Arabian Nights
Aramis	Arantius Duct	Julius Caesar Aranzi	François Arago	$In optics, the Arago spot, Poisson spot, or Fresnel spot is a bright point that appears at the center of a circular object's shadow due to Fresnel diffraction. This spot played an important role in the discovery of the wave nature of light and is a common way to demonstrate that light behaves as a wave (for example, in undergraduate physics laboratory exercises). The Arago spot was result of experiments conducted by Dominique François Jean Arago.$ Arago Spot	Arago Medal - David D'Angers
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