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Schrödinger's mathematical description of electron waves superseded matrix mechanics, developed in 1925 by Max Born and Werner Heisenberg, which also described the structure of the atom mathematically but, unlike wave mechanics, gave no picture of the atom. It was later shown that wave mechanics is equivalent to matrix mechanics.
Green stands for the country's natural resources. White represents peace, justice, and unity. Blue recalls the sea and the capital Freetown's natural harbour. Effective date: 27 April 1961.
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