Monday, October 25, 2010

Kayly Adams
Question 1B?

Ernest Rutherford: Known as the father of nuclear physics. he discovered the concept of radioactive half life, proved that radioactivity involved the transmutation of one chemical element to another, and also differentiated and named alpha and beta radiation. He was awarded the Nobel Prize in Chemistry in 1908 "for his investigations into the disintegration of the elements, and the chemistry of radioactive substances". he postulated that atoms have their positive charge concentrated in a very small nucleus, and thereby pioneered the Rutherford model, or planetary, model of the atom, through his discovery and interpretation of Rutherford scattering in his gold foil experiment. He is widely credited with first splitting the atom in 1917, and leading the first experiment to "split the nucleus" in a controlled manner by two students under his direction, one being John Cockcroft..

John Cockcroft: A British physicist, he shared the Nobel Prize in Physics for splitting the atomic nucleus with Ernest Walton, and was instrumental in the development of nuclear power. In 1928, he began to work on the acceleration of protons with Ernest Walton. In 1932, they bombarded lithium with high energy protons and succeeded in transmuting it into helium and other chemical elements. This was one of the earliest experiments to change the atomic nucleus of one element to a different nucleus by artificial means. In 1951, Cockcroft, along with Walton, was awarded the Nobel Prize in Physics for his work in the use of accelerated particles to study the atomic nucleus.

Ernest Walton: He was an Irish physicist and Nobel laureate for his work with John Cockcroft with atom-smashing experiments done at Cambridge University in the early 1930s. Walton is the only Irishman to have won a Nobel Prize in science.Walton and John Cockcroft collaborated to build an apparatus that split the nuclei of lithium atoms by bombarding them with a stream of protons accelerated inside a high-voltage tube (700 kilovolts). The splitting of the lithium nuclei produced helium nuclei. This was experimental verification of theories about atomic structure that had been proposed earlier by Rutherford, George Gamow, and others.

Erwin Schrodinger: He was an Austrian theoretical physicist who was one of the fathers of quantum mechanics, and is famous for a number of important contributions to physics. Especially his experiment, Schrodinger equation, for which he received the Noble Prize in Physics for in 1933. In 1935, after much correspondence with his friend ALBERT EINSTEIN, he proposed the Schrodinger's Cat Thought Experiment.

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