[ [10]
Fizeau found
where
is the index of refraction of the liquid. On the other hand, owing to the smallness of
as compared with 1, we can replace (B) in the first place by
or to the same order of approximation by
[ [10]
Fizeau found
where
is the index of refraction of the liquid. On the other hand, owing to the smallness of
as compared with 1, we can replace (B) in the first place by
or to the same order of approximation by