May 9, 2013
The idea of atoms dates back to antiquity. In ancient times philosophers argued about the existence of these fundamental components of matter. They had little idea about the structure of atoms except that they were thought to be indivisible, and this was the origin of the word atom. Ironically, the modern understanding of what we […]
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April 11, 2013
In 1912 the Austrian physicist Victor Hess conclusively demonstrated the existence of cosmic rays when he took an electrometer to an altitude of over 5000 metres in a hot-air balloon. At this altitude Hess detected four times as much radiation as at ground level. We now know that the Earth is continually bombarded by high energy particles […]
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