Cherenkov detectors are devices used to detect charged particles moving faster than the speed of light in a specific medium, such as water or glass. When these particles travel through the medium, they emit a faint blue light known as Cherenkov radiation. This phenomenon occurs because the particle disturbs the electromagnetic field of the medium, causing the emission of light. These detectors are commonly used in various fields, including particle physics and astrophysics, to study high-energy particles. They can help identify the type and energy of particles, contributing to research in areas like cosmic rays and neutrino detection, as well as experiments at facilities like the Large Hadron Collider.