Speed of light
History

<1638
Galileo, covered lanterns
inconclusive
inconclusive
<1667
Accademia del Cimento, covered lanterns
inconclusive
inconclusive
1675
Rømer and Huygens, moons of Jupiter
220000
‒27% error
1729
James Bradley, aberration of light
301000
+0.40% error
1849
Hippolyte Fizeau
315000
+5.1% error
1862
Léon Foucault, rotating mirror
298000±500
‒0.60% error
1907
Rosa and Dorsey, EM constants
299710±30
‒280 ppm error
1926
Albert A. Michelson, rotating mirror
299796±4
+12 ppm error
1950
Essen and Gordon-Smith, cavity resonator
299792.5±3.0
+0.14 ppm error
1958
K.D. Froome, radio interferometry
299792.50±0.10
+0.14 ppm error
1972
Evenson et al., laser interferometry
299792.4562±0.0011
‒0.006 ppm error
1983
17th CGPM, definition of the metre
299792.458 (exact)
exact, as defined

Question: What did Hippolyte Fizeau contribute to the measurement of the speed of light?
Answer: Hippolyte Fizeau determined the speed of light and reported a value of 315000.