Dan wrote:
>It would be better to say that there is a natural upper
>velocity: c, and that an object will travel this velocity if and only
>if it
>has no rest mass. Photons are the only known particles with zero rest
>mass.
I can never remember if neutrinos have non-zero rest mass. Has it been
conclusively shown that they do? Or is just very likely that they do?
Or is it likely that they don't?
I was always under the impression that neutrinos traveled at c, has
that been shown to be wrong? Or is our technology for observing
neutrinos so poor that we can't say for sure?
=====
Darryl
Think Galactically -- Act Terrestrially
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