Certainly Will but some here have been challenging the premise that momentum is conserved, speculating that wave-particle duality might provide some legal loop-hole...
As usual, I'm tight on time to bend down to the, uhm,

"hoi-ploi", so perhaps you could excercise your ever unlimited patience here, and educt them on how there's no getting away with it.
In the pool-ball argument of course it is simple, no matter what the angle of the surface and ball motion one can always take the x and y components. This may help to understand exactly how, in any case, the change in the vehicle's momentum will always be opposite to the change in that of the ball. Therefore, if the ball is to never escape, a prolonged increase in the vehicle's (time-averaged) momentum would imply the same for the ball, in the same way instead of the opposite way. Although it's less simple to eviscerate the details for photons in quantum formalism, there is no escaping momentum conservation.
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Inutil insegnŕ al mus, si piart timp, in plui si infastiděs la bestie.
Hypography Forum PITA...... er, Administrator.
