Photon detectors are devices that capture and measure light particles, known as photons. They play a crucial role in various applications, including astronomy, medical imaging, and telecommunications. By converting light into electrical signals, these detectors help scientists and engineers analyze and interpret light-based information. There are several types of photon detectors, such as photomultiplier tubes and avalanche photodiodes. Each type has its own advantages and is suited for specific tasks. For example, photomultiplier tubes are highly sensitive and can detect very low levels of light, making them ideal for scientific research and particle physics experiments.