I have always been trying to understand and visualize what wave is and how it's been produced. I guess what ordinary people know about wave is just a particle moving up and down but last week I came across this image that titled “how particles produce Wave”. According to this image, the interaction between particles and how close they got produces wave, in other words, a single particle cannot produce wave.
I really want to know the credibility of this image and if that is true or not. Now if this image is true, another question is why atoms in matter doesn't produce any wave but photons do?
I always thought that wave is produced by swinging a single particle but that vision never convinced me and I knew something is wrong. I want to know if waves are produced by a collective movement of particles (not a single particle). Is this always the case; is any wave in the universe produced this way?