Originally Posted By: Bill S.
Would you not need more than "quite good accuracy" to measure something as small as the difference between "c" and the speed of these neutrinos?

It depends on your definition of "quite good accuracy". My definition is "good enough for the job on hand". If I'm on an interstate highway "good enough" is probably on the order of a couple of miles. If I'm trying to measure the speed of neutrinos then it has to be a lot better.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.