photodiode

A photodiode is an electronic device that converts light into electrical signals. When light hits the photodiode, it generates a small electric current proportionate to the light's intensity. Made from semiconductor materials like silicon, it acts as a light sensor, commonly used in cameras, optical communication, and other systems requiring light detection. Photodiodes are valued for their speed, accuracy, and ability to detect even faint light signals, making them essential in modern electronics where precise light measurement is necessary.