2. The wave-particle duality of light (1) Particle Character: The fact that light travels in straight lines, is reflected and refracted and has the ability to impart momentum to anything it strikes -Particulate model (2)Wave Character: The phenomena of diffraction and interference-Wave model When quantum theory was proposed the wave model was dominant The electromagnetic spectrum: Fig. 1 (The visible light is all band of electromagnetic2. The wave-particle duality of light (1) Particle Character:The fact that light travels in straight lines, is reflected and refracted and has the ability to impart momentum to anything it strikes. -- Particulate model. (2) Wave Character: The phenomena of diffraction and interference.--Wave model. When quantum theory was proposed the wave model was dominant. The electromagnetic spectrum:Fig.1 (The visible light is all band of electromagnetic)