2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83358We state several ideas based on the view-point of particle behaviour of matter to explain wave character of photon and elementary particles. By using Newton's suggestion of light ray, we clarify integrally the behaviour of light ``wave''. And ``wave'' character of particles is also explained by the view-point of particle.12 pages, 10 figuresGeneral Physicstext