What is the difference between diffraction and interference? Group of answer choices Diffraction refers to multi-slit scattering while interference refers to double slit scattering. Diffraction is relevant only to single slit apparatus. Interference is relevant to all wave phenomena. Diffraction is the focusing of light to a spot. Interference is the sinusoidal wave patterns of traveling light. Diffraction is a process that changes the direction of light waves, usually as they pass near obstacles. Interference occurs when two or more light waves meet at a point. There is no difference between diffraction and interference