Radon
Worldwide, naturally occurring radioactive radon gas seeps from rocks and soils, where it can accumulate in buildings at hazardous levels. The World Health Organization estimates that as many as 14 percent of lung cancers are due to radon exposure.
Radon detection – radon and some of its daughter products emit alpha particles as they decay. These alpha particles are responsible for most of the damage to human tissue that occurs when radon gas is inhaled, but they will also produce a slew of electron-hole pairs that show up as illuminated pixels should they strike the CMOS image sensor chip that’s at the heart of many webcams.
- Radon detector – make a cheap and effective radon detector with five basic elements: a webcam, a funnel covered with copper tape and mesh, a voltage multiplier built from some basic electrical components, a box, and a computer.
engineering 4 kids 