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Hippolyte Fizeau

French physicist (1819–1896)

Source-basedStable
Lived 1819–1896, aged 77
ScientistsScientist
  • Fame9.6
  • Momentum4.9
  • Scientists rank#148
  • Wikipedia2.6K
  • Wikipedia
    53 languages
    Cross-language footprint
  • Era
    1819–1896
    Aged 77
Summary
Updated 2026-05-29

Measured light's speed to within 5% accuracy in 1849—a flex that held up for decades. Fizeau also figured out how fast light travels through moving water, which is exactly as niche but oddly essential as it sounds.

Biography

About

Armand Hippolyte Louis Fizeau was a French physicist who, in 1849, measured the speed of light to within 5% accuracy. In 1851, he measured the speed of light in moving water in an experiment known as the Fizeau experiment.

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Tags & topics

#Scientists#Scientist#Physics#Astronomy#Photography#19th Century
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Score breakdown

The six component signals behind the Fame score, and their ranks across the leaderboards.

Fame
Stable
9.6
Composite of search demand, mentions, audience & graph footprint.
Score components
Momentum4.9
Historical19.1
Source confidence60.0
Completeness60.0
Global rank
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Country rank
—
Category rank
#148
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Sources

  • Wikipedia
    wikipedia · en.wikipedia.org
    High confidence
  • Wikidata
    wikidata · wikidata.org
    High confidence
  • Pantheon 2.0
    database · pantheon.world
    High confidence
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