46538
Hence , in 1850 , when Foucault and Fizeau found by experiment that light travels more slowly in water than in air , in accordance with the wave explanation of refraction and contrary to the corpuscular explanation , the result came as no surprise .
 Foucault, Fizeau
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Foucault, Fizeau