Beta radiation was first detected over 100 years ago. Beta radiation is the ejection of energetic electrons and anti-electrons (called positrons) from an atom. These electrons and positrons are moving with incredible force. They smash into our bodies and may cause harm. Beta radiation is one of the largest sources of radiation humans are exposed to.
You Eat This Each Day!!!
This atom is Potassium-40, a radioactive version of the Potassium you and I eat each day in our bananas and vitamins. When you eat light salt or Potassium salt, you are eating Potassium Chloride, mostly, which contains small amounts of K-40, radioactive Potassium! Yum!
Beta radiation is stopped by thin metal easily, a sheet of aluminum being the most often cited method.
Three more videos are coming!
Gamma and X-Ray Radiation, Geiger Counters 101 Part Four
Radiation Math, Geiger Counters 101 Part Five