The lack of basic scientific literacy on here is even worse than I thought...Speed (
v) is
defined as a derived quantity, distance
d covered per unit time
t:
v =
d /
t
If you measure the base quantities (here distance and time) a derived quantity (here speed) is defined by, that
is a direct measurement of the derived quantity, whether for light or anything else. The clue's in the name of the paper: "A small tabletop experiment for a
direct measurement of the speed of light".
Oh and:
After 26 years of workdays spent watching bacteria multiply, Richard Lenski has learned that evolution doesn’t always occur in steps so slow and steady that change can’t be observed.
news.harvard.edu