Mike Kreuzer wrote:
> OK, out of all this, this is the bit I still don't get. Maybe I didn't go
> the day this was explained in high school or something, but isn't momentum =
> mass * velocity? So no mass, no momentum?
That's the Newtonian definition ("quantity of motion is equal to quantity
of matter and velocity conjointly"). In a relativistic world, it isn't a
valid definition, and has to be supplanted by the Planck formula.
Brian Tung <brian@xxxxxxx>
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