if the particles are farther away from each other, then the vibrations of particles will spread slower
waves is not moving_water. bouncing_trajectory is not trajectory. photons is not both_particles_and_waves. shadow is not localized_spatial_thing. photons is both_particles_and_waves. waves is moving_water. electromagnetic_radiation is not both_wave_and_particle. scientists has discovered_particles_far_smaller_than_atoms vibration is not motion. fundamental_particle is not localized_spatial_thing.