Fresnel Prisms

 

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Augustine-Jean Fresnel, 1788 – 1827

 

Augustine-Jean Fresnel was a French engineer and physicist who studied light, diffraction, and polarization.  He also developed a unique lens that replaced the use of mirrors in lighthouses.

 

 

Fresnel lenses are used in ophthalmology as prisms that can bend light in order to correct double vision.  In honor of Fresnel’s achievements, an escarpment on the moon is named after him, as photographed below.

 

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