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2011-01-26 10:01:59

Solar cells are made from semiconductors whose ability to respond to light is determined by their band gaps (energy gaps).


Word of the Day
bretelles
  • In dressmaking, straps running from the belt in front over the shoulders to the belt in the back, with more or less elaboration of trimming and outline. They usually broaden at the shoulder and narrow toward the waist.
The word 'bretelles' comes from a French word meaning 'braces'.