photometer

A photometer is a device used to measure the amount of light in a specific area or the brightness of a surface. It works by detecting light intensity and converting it into a readable value, often indicated on a dial or digital display. Photometers are commonly used in fields such as photography, astronomy, and environmental science to ensure proper lighting conditions, evaluate light sources, or study how much light a surface reflects or absorbs. Essentially, it helps quantify light levels accurately to support various scientific, industrial, and artistic applications.