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LED is an abbreviation for light-emitting diode. An LED consists of a chip of semiconducting material doped with impurities to create a p-n junction. As in other diodes, current flows easily from the p-side, or anode, to the n-side, or cathode, but not in the reverse direction. Charge-carriers - electrons and holes - flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon.
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What was the purpose of dynamite?
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Latino farm workersANS 2 -The United Farm Workers of America.
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the construction of the bastille
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Anti-Climax ????????
What is the construction and working principle of kaplan turbine?
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