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v. t. e. In finance, an exchange rate is the rate at which one currency will be exchanged for another currency. [1] Currencies are most commonly national currencies, but may be sub-national as in the case of Hong Kong or supra-national as in the case of the euro. [2]
The Seventh-day Adventist Church is as of 2016 "one of the fastest-growing and most widespread churches worldwide", [4] with a worldwide baptized membership of over 22 million people. As of May 2007, it was the twelfth-largest Protestant religious body in the world, and the sixth-largest highly international religious body.
Main article: Light-emitting diode physics. In a light-emitting diode, the recombination of electrons and electron holes in a semiconductor produces light (be it infrared, visible or UV), a process called " electroluminescence ". The wavelength of the light depends on the energy band gap of the semiconductors used.