👉 A granometer is a type of optical device used to measure light intensity in an area. It consists of a filter that can be changed to detect different wavelengths of light, allowing it to measure and convert the light into electrical signals. Granometers are commonly used for measuring the intensity of visible light (UV) or infrared radiation emitted by objects like lamps, cameras, or even human eyes. They work by using a filter that allows certain wavelengths of light to pass through but blocks others. The intensity of
