An LED (Light Emitting Diode) is constructed from a p-n junction based on a certain semi-conducting material with a band

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answerhappygod
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An LED (Light Emitting Diode) is constructed from a p-n junction based on a certain semi-conducting material with a band

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An LED (Light Emitting Diode) is constructed from a p-n junction
based on a certain semi-conducting material with a band gap of 1.89
eV. What is the wavelength of the emitted light? Give your answer
to the closest nm (no decimal places). Do not include the
units.
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