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Which outcome results when the band gap of an LED under high current narrows?

A)Luminescence efficiency decreases significantly
B)Increased thermal runaway occurs swiftly
C)Wavelength of light emitted shortens
D)Reverse leakage currents are amplified

💡 Explanation

The emitted wavelength decreases because band gap narrowing increases the energy of photons via stimulated Emission, therefore the light shifts to higher-frequency, shorter-wavelength emission, rather than efficiency decreasing which occurs under carrier leakage in other scenarios.

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