Fundamental interaction

In physics, the fundamental interactions or fundamental forces are interactions in nature that appear not to be reducible to more basic interactions. There are four fundamental interactions known to exist: gravity, electromagnetism, weak interaction, and strong interaction. The gravitational and electromagnetic interactions produce long-range forces whose effects can be seen directly in everyday life.

Extends: [Fundamental interactions](https://wikipedia.org.ai/Fundamental interactions), [Physical phenomena](https://wikipedia.org.ai/Physical phenomena)