So, the common high school physics example of a transverse wave is a "stadium wave" ... but, I'm wondering if this is actually longitudinal in terms of particle transmission. Each particle (audience member) is only standing up/down. The particles/audience stay in place and don't propagate/run down the seats. Light is (almost trivially) referred to as a transverse wave, but how do the photons "move"? In sound, the particles are disrupted... are the photons disrupted?