Interaction can be defined as that action that occurs between two or more people or objects, which is determined by some degree of reciprocity. This concept is applied in endless scientific and humanistic areas, giving it, according to the context, a different connotation; however, it always maintains the original meaning: it involves different objects, which influence and modify each other, taking into account the situation and the circumstances that surround it. It is present in biology, with the interaction of living beings with their environment, in computing, in human-computer interaction and in weather, with the interaction between two cyclones in the same space.
In astronomy, this can be found in the theory of the interaction of galaxies, the one in which it is explained how these are capable of disturbing the gravitational field of the other. Meanwhile, in physics, it is present in the four fundamental interactions between particles, these being: electromagnetic interaction, gravitational interaction, weak nuclear interaction and strong interaction.
Similarly, other interactions between particles are also found, such as exchange, weak electro, and Yukawa. In biochemistry, this concept is involved in the allosteric interaction, in which the structural changes of proteins are described.
In the social sphere, it is known as contact interaction between two entities. Outside of scientific meanings, it is common for this to be related to communications between living beings and the feedback that this entails for those involved. From this premise, what is known as interactivity is also born, that process in which various individuals, called users, interact through a computer system.
