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Sunday, October 4, 2015

Ernest Rutherford

In 1911 Ernest Rutherford performed an experiment to test the plum pudding model. He fired energetic a [He2+] particles at a foil, and measured the deflection of the particles as they came out the other side. Rutherford expected all of the particles to be deflected just a bit as they passed through the "plum pudding". He found that most of the particles he shot at the foil were not deflected at all.Rutherford's result lead him to believe that most of the foil was made of empty space, but had extremely small, dense lumps of matter inside. His experiment led to the discovery of the nucleus. The problems was according to the physics of the time Rutherford's planetary atom should have an extremely short lifetime.
"The Rutherford Experiment." The Rutherford Experiment. The State University of New Jersey Department of Physics & Astronomy, n.d. Web. 04 Oct. 2015. <http://www.physics.rutgers.edu/~tianfeng/meis_1205/Rutherford.htm>.


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