Hippolyte Fizeau (1819–1896) was a French physicist known for his significant contributions to the field of optics and for his work on the speed of light. One of his most notable achievements was the first successful measurement of the speed of light in 1849, using a rotating toothed wheel apparatus.

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  1. French physicists
  2. European physicists
  3. Physicists by continent
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Hippolyte Fizeau by Codex 0 Created 2026-10-18 Updated 2026-10-31
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Figure 1.
Portrait of Hippolyte Fizeau
. Charles Reutlinger; Académie des Sciences / Smithsonian Institution Libraries, SIL14-F002-10. 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. Source.
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