WONDER #1322: How Does a Smoke Detector Work?

Question 1 of 3

Whose invention led to the development of ionization chamber smoke detectors?

  1. Ernst Meili
  2. Albert Einstein
  3. Benjamin Franklin
  4. Marie Curie

Question 2 of 3

Photoelectric smoke detectors use light beams or low-powered what to detect smoke?

  1. electrical currents
  2. radioactive materials
  3. lasers
  4. bacon

Question 3 of 3

The ionization chamber of most ionization smoke detectors contain which radioactive element?

  1. uranium-231
  2. radium
  3. hydrogen
  4. americium-241

Check your answers online at https://wonderopolis.org/wonder/how-does-a-smoke-detector-work.