Question:
When LED is manufactured by using aluminium gallium arsenide (AlGaAs), it emits
When LED is manufactured by using aluminium gallium arsenide (AlGaAs), it emits
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AlGaAs is commonly used in remote controls and infrared sensors because of its specific emission wavelength.
Updated On: Apr 30, 2026
- ultra-violet light
- infra red radiation
- green light
- blue light
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Concept
The color of light emitted by an LED depends on the bandgap energy of the semiconductor material used.
Step 2: Analysis
Aluminium Gallium Arsenide (AlGaAs) is a semiconductor material with a specific energy gap that corresponds to the infrared region of the electromagnetic spectrum.
Step 3: Conclusion
Therefore, LEDs made from AlGaAs are primarily used to emit infrared radiation.
Final Answer: (B)
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