If two waves with equal but opposite in amplitude, collide ata point equal distance from each other so the amplitude goes tozero, what can be said about the energy? Does it go to vanishat this instance as well?

I know for a wave that PE = KE.  

Here is what the solution says: "No, the energy does not vanish,consider the kinetic energy"

Does this mean that in the collision the kinetic energy is whatcauses the amplitude to go to zero, but there is still a potentialremaining? Or is it the potential energy that causes theamplitude to go to zero and the remaining energy is in the form ofkinetic (although this doesn't seem right).

Any ideas?



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