Weak interactions, also known as weak nuclear force, are one of the four fundamental forces in nature. They are responsible for processes like beta decay, where a neutron transforms into a proton, emitting an electron and an antineutrino. This force operates at a very short range, typically less than the size of an atomic nucleus, and is crucial for the stability of atomic nuclei. The weak force is mediated by W and Z bosons, which are heavy particles that carry the interaction. Unlike the strong nuclear force, which binds protons and neutrons together, weak interactions play a key role in nuclear reactions and the behavior of subatomic particles. They are essential for understanding phenomena in particle physics and the evolution of stars.