Answer :
Final answer:
Photoelectric smoke detectors detect minute particles and aerosols produced during combustion by ionizing the air between two electrode plates in the ionizing chamber.
Explanation:
Photoelectric smoke detectors detect minute particles and aerosols produced during combustion. Inside a smoke detector, Am-241 emits alpha particles that ionize the air between two electrode plates in the ionizing chamber. When smoke particles enter the chamber, they impede the flow of ions, triggering an alarm.
