I think of Particles, Electrons, Protons, Up Quarks, Strange Quarks, etc. They all have mass, and therefore have volume... So they are 3D right? But when I think of forces and waves, light waves, sound waves, photons, gravity (gravitons), they are essentially mass-less and therefore have no depth... which means they are 2D right? They may travel through the 3 dimension.... but they are 2D and a planar? Correct? Is there any way of proving this?