The principle of superposition of waves states that when two or more propagating waves of the same type are incident on the same point, the resultant amplitude at that point is equal to the vector sum of the amplitudes of the individual waves. Cropped tomography scan animation of laser light interference passing through two pinholes (side edges). Mechanisms Interference of right traveling (green) and left traveling (blue) waves in Two-dimensional space, resulting in final (red) wave Interference of waves from two point sources. The word interference is derived from the Latin words inter which means "between" and fere which means "hit or strike", and was coined by Thomas Young in 1801. Interference effects can be observed with all types of waves, for example, light, radio, acoustic, surface water waves, gravity waves, or matter waves as well as in loudspeakers as electrical waves. The resultant wave may have greater intensity ( constructive interference) or lower amplitude ( destructive interference) if the two waves are in phase or out of phase, respectively. In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference. Out of phase: (here by 180 degrees), the two lower waves combine (right panel), resulting in a wave of zero amplitude (destructive interference). In phase: the two lower waves combine (left panel), resulting in a wave of added amplitude (constructive interference). ( February 2022) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.
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