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← ScienceWhich 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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