Active neutrinos

Active neutrinos are tiny, nearly massless particles that rarely interact with matter, making them difficult to detect. They are called "active" because they participate in the weak nuclear force, one of the four fundamental forces of nature, enabling them to change types, or "flavors," as they travel—such as from electron neutrino to muon neutrino. They are essential in processes like nuclear reactions in the sun and are fundamental components of the Standard Model of particle physics. Despite their elusive nature, their study helps scientists understand the universe's fundamental workings and the behavior of the tiniest particles.