Cecil Moore wrote:
Tom Donaly wrote:
Actually, you're writing about momentum density. Momentum is
conserved, but momentum density isn't, ...

The momentum density may certainly change with area just
as the energy density may change with area. But in either
case, the total energy and total momentum are conserved.

As for any finite number being an infinite percentage above
zero, I think you should take that up with the next mathematician
you meet.

The equation for any percentage change from zero is
100(X-0)/0 Plug any value of X into that equation and
see what you get.

Division by zero is not infinity, Cecil, it's undefined.
It's good to see you agree that there's no conservation of
______ (fill in the blank)density, any more than there's a
law of the conservation of power. Have a good thanksgiving.
73,
Tom Donaly, KA6RUH