state the factor which controls wavelength and intensity of light emitted by an LED?
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The semiconductor through which the current flows, controls wavelength and intensity of light emitted by an LED (Light Emitting Diode).
The effect of Electroluminescence, which is created by electrons in the semiconductor, recombining with the electron holes and releasing energy in the form of photons, is what causes the light.
LED light is used extensively in architecture, aviation, lighting of public spaces, security, mining operations etc.
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