I've problem here. Imagine you've a line of spheres that are attached to each other with springs. You push one sphere down hard. it drags its neighbors down and which in turn pull their neighbors and so on. You have created a wave. Now you can quantify the rate this is progressing and call it velocity of wave.
Now lets say 2 opposite waves are colliding, the sphere right in middle gets pulled down from right side and up from left. Equal opposite forces, it shouldn't move, and that's what happens. But since it hasn't moved it shouldn't pull any of its neighbors either, yet wave continues travelling through. Destructive interference didn't cancel out the wave? why.. is this model only applicable to single atoms? or something else.
Explain that please.
rant ignore it if you want....
There is other question which was asked here and it doesn't have a suitable explanation. It just says well waves continue to travel because they have velocity. Instead of describing the reason behind phenomena it just describes model that's used to measure it. "Why is Car moving? Well because it's going 30 mph".