What Does A Photoelectric Smoke Alarm Detect? A photoelectric smoke detector is characterized by its use of light to detect fire. Inside the alarm, there’s a light-sensing chamber. In this chamber, an LED light shoots a beam of light in a straight light across the chamber. Which is better ionization or photoelectric smoke alarm? Ionization
Why Sodium Metal Is Used In Photoelectric Effect? This is because the valence electron are loosely bound to the nucleus of atom and are easily liberated by absorbing small amount of energy. Why sodium is used in photoelectric effect? A sodium photoelectric surface with work function 2.3eV is illuminated and emits electrons. The electrons travel
What Is A Photoelectric Smoke Detector? The second type of smoke detector is photoelectric, which uses a light beam to help detect the presence of smoke. According to NFPA, these alarm types are more effective at sounding when a fire originates from a smoldering source, like a lit cigarette that falls into a couch cushion.