- Women's measurements
- Big Mac
- Brain membranes
- The Number Three in American Culture
- Nina, Pinta, and the Santa Maria
- Three Furies
- Pythagoras - three is the perfect number
- How many triangles?
- Trinity symbol
- Simon Cowell: You Never Want The People That You Work With To Do Well
- Threes.com featured on the BBC2
- id, ego, superego
- Third Eye - Pineal Gland
- Featured Article - Allen H. Merriam
- Empirical rule - The 68-95-99.7 Rule
- Three Foil Cross
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- Bible threes
|Three Types of Radiation|
Of the five main types of radiation, three types of radiation are of special concern related to our health. The three of main concern are Alpha, Beta and Gamma radiation.
What is Radiation
Radiation is everywhere. It has been around since the creation of the earth. It can be found in rocks, soil, water, plants and sometimes in the sky.
Because of of its wide spread use, there is increased potential for unwanted human exposure.
Sometimes unwanted exposure comes from technological advancements. Now that aircraft can travel higher in the atmosphere, there are radiation exposure risks that do not affect those of us with our feet on the ground. Then there is always the risk of radioactive fall out from the occasional super power flexing their atomic strong arms.
Some people are exposed to radiation event though they do not work with or near radioactive materials. One job with high radiation exposure is firefighting. The concern is with the three types of radiation of the five that are most dangerous.
Five Types of Radiation
At the end of the 19th century Thomson and Rutheford studied the phenomenon of the ionisation of gases illuminated with the rays discovered by Becquerel. During the experiment Rutheford discovered that there were two kinds of such radiation: The first one called the alpha rays was easily absorbed even by paper; the second one called the beta rays could penetrate through even thick metal brasses like for example 0.25 centimetres of aluminium. Soon the third kind of radiation was discovered. It had high penetrating power - it could go through even a couple of centimetres thick layers of lead. This third kind of radiation was called the gamma rays.
"Three fishers went sailing away to the west, Away to the west as the sun went down.''
- Charles Kingsley, The Three Fishers
|Herb O Buckand has an enormous interest in the structure of threes and has been collecting and examining these concepts for years. He has an exciting website for his Threseology Research Journal located at http://www.threesology.org. Here he delves into concepts in threes in many different areas. He is a true generalist.|