Hippolyte Fizeau
= Hippolyte Fizeau
{c}
{tag=Physicist}
{title2=1819–1896}
{wiki}
= H. Fizeau
{c}
{synonym}
<Hippolyte Fizeau> tested the effect of moving <water> on the propagation of <light>. Two beams traversed flowing <water> in opposite senses and were recombined so that a travel-time difference appeared as a shift of <interference fringes>. Reversing the flow supplied a controlled comparison. His 1851 report compared the observed shift with competing accounts of how motion of a transparent medium affects <light>, making a small propagation change measurable without directly timing the transit.<The Hypotheses Relating to the Luminous Aether by Hippolyte Fizeau>[1851 report, opposite propagation through moving water, flow reversal and fringe shifts]{ref}
A <physicist>.https://www.academie-sciences.fr/pdf/dossiers/Fizeau/Fizeau_od1.htm[Independent biographical identity and professional specialization]{ref}
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{title=Portrait of <Hippolyte Fizeau>}
{description=Charles Reutlinger; Académie des Sciences / Smithsonian Institution Libraries, SIL14-F002-10. https://commons.wikimedia.org/wiki/File:Hippolyte_Fizeau.jpg[Commons PD-old/life-plus-70 claim in country of origin, with a separate-US-tag request. Longer-term jurisdictions may differ.], via Wikimedia Commons.}
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