A Linac, or linear accelerator, is a device that uses electromagnetic fields to accelerate charged particles, such as electrons or protons, to high speeds. These particles are then directed towards a target, often for purposes like medical treatment or scientific research. In medicine, Linacs are commonly used in radiation therapy to treat cancer by delivering precise doses of radiation to tumors. In addition to medical applications, Linacs are also utilized in various fields of physics and engineering. They can be found in particle physics experiments, where they help in studying fundamental particles and forces. Overall, Linacs play a crucial role in advancing both healthcare and scientific knowledge.