Two talks on the physics of the solid state by G. F. J. Garlick, D.SC., F.inst.P., Professor of Physics in the University of Hull.
The physical properties of many solids depend on the presence of traces of impurity and imperfections in the bulk material. From research in this field, and from the rapid expansion of solid-state physics generally, have come new devices such as the transistor and the thermo-electric refrigerator.
In his first talk Professor Garlick discusses, with simple analogies and models, the success of wave mechanics in explaining not only the electronic behaviour of semi-conductors but the existence in them of other 'particles' known as 'positive holes'.
Repeated on Saturday at 9.10 (Home)
Second talk: next Friday
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