Superposition principle

Superposition of almost plane waves (diagonal lines) from a distant source and waves from the waves of the ducks. Linearity holds only approximately in water and only for waves with small amplitudes relative to their wavelengths.

In physics, the superposition principle states that if there are two or more stimuli at a given point in time, the response will be the result of adding all the responses. This only applies to linear systems. Since many systems can be modelled as linear systems, the principle has many applications in physics and engineering.

Superposition Principle Media

Rolling motion as superposition of two motions. The rolling motion of the wheel can be described as a combination of two separate motions: translation without rotation, and rotation without translation.
Two waves traveling in opposite directions across the same medium combine linearly. In this animation, both waves have the same wavelength and the sum of amplitudes results in a standing wave.
two waves permeate without influencing each other
green wave traverse to the right while blue wave traverse left, the net red wave amplitude at each point is the sum of the amplitudes of the individual waves.
Interference of two waves

This short article about science can be made longer. You can help Wikipedia by adding to it.

Superposition principle: The principle states that the total force on a given charge is the vector of the individual forces exerted on the given charge by all other charges. Each individual force between any two charges is calculated from Coulomb's law tattoos and is not affected by the presence of other charges