Optical smoke detectors use a light source and a sensor to detect smoke particles in the air. When smoke enters the detector, it scatters the light, triggering the alarm. These detectors are effective for detecting smoldering fires, which produce larger smoke particles. Unlike ionization smoke detectors, which rely on radioactive materials, optical detectors are generally safer and easier to maintain. They are suitable for various environments, including homes and commercial buildings, and can be interconnected with other safety systems for enhanced protection. Regular testing and maintenance are essential for optimal performance.