Neutrino detectors help us to find and measure neutrinos, which are tiny, invisible particles. In order to measure neutrinos, scientists use special machines that are really sensitive to the light that comes off the particles. Neutrino detectors use a process called Cherenkov radiation, which helps them see the light that comes when a neutrino hits something. By looking at the Cherenkov light, the detectors can tell how many neutrinos there are and how much energy they have. They can also tell where the neutrinos are coming from, which helps scientists understand more about the universe.