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" "It's not observation but theory that led me to this result that experience has confirmed afterwards.
Augustin-Jean Fresnel (10 May 1788 – 14 July 1827) was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton's corpuscular theory, from the late 1830s until the end of the 19th century. But he is perhaps better known for inventing the catadioptric (reflective/refractive) Fresnel lens and for pioneering the use of "stepped" lenses to extend the visibility of lighthouses, saving unknown numbers of lives at sea.
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Dans le choix d'un système, on ne doit avoir égard qu'à la simplicité des hypothèses; celle des calculs ne peut être d'aucun poids dans la balance des probabilités. La nature ne s'est pas embarrassée des difficultés d'analyse; elle n'a évité que la complication des moyens. Elle paraît s'être proposé de faire beaucoup avec peu : c'est un principe que le perfectionnement des sciences physiques appuie sans cesse de preuves nouvelles.
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