Incredibly, so was the original symbol of 1946!
A new form of nuclear energy as a universal signaling required. In 1946 the Berkeley Radiation Laboratory , University of California, created the symbol - known as trefoil : a circular atom emits radiation, with which you should mark any cargo, equipment or material nuclear. Do you suggest danger, risk or fear? To us either!
trifoil second version of the force since 1948
The criticism began to take effect, and early 1948, the Oak Ridge National Laboratory replaced blue and yellow. This version was more serious but also still not describe the real threat posed to people being near a radioactive source.
The traditional symbol to indicate the radiation hazard
the late '50s, the American National Standards Institute normalized symbol with black and yellow colors we know. Here, the signal becomes more serious, more gloomy, and is accepted universally. But it would be the latest incarnation of the radiation warning sign.
And finally comes a signal that is scary!
In 2007 the IAEA established this symbol as which should indicate the presence of radioactive material / ionizing. Tested with 1650 people and even children, who they said rightly that red-imposed upon them more fear than yellow. Trefoil is maintained but nothing is left to chance: it arise rays that go into a skull (death eternal symbol) and a human figure moving away swiftly and quickly. Will the final version?
Wikipedia has come to be our great ally. Thanks again .
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