* Electromagnetism: This force governs the interaction of charged particles and is responsible for phenomena like electricity, magnetism, and light.

* Weak force: This force is responsible for radioactive decay and certain nuclear reactions.

The electroweak force was proposed by Sheldon Glashow, Steven Weinberg, and Abdus Salam in the 1960s and experimentally confirmed in the 1970s. It describes how these two seemingly distinct forces are actually different aspects of the same underlying interaction, acting at very high energies.