Interaction

Out of the three types of interactions, it is the electromagnetic force that we experience daily. This is the force that explains how the magnet for the paper note on the refrigerator works, why the hair becomes electrical when you comb it, and how an electrical current can drive an engine. The strong force only acts inside the smallest components of matter, and it is not directly noticeable in our daily world. The weak force also acts inside the inner parts of atom nuclei. Since it among other things are responsible for radioactive decay and makes the sun shine, we also notice the effect of the weak force in our common lives.

Courtesy of The Particle Adventure.