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Colour of Light Emitted by Led Depends Upon - Physics

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Question

Colour of light emitted by LED depends upon__________________ .

  1. its forward bias
  2. its reverse bias
  3. the band gap of the material of semiconductor
  4. its size

Solution

the band gap of the material of semiconductor

  Is there an error in this question or solution?
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Solution Colour of Light Emitted by Led Depends Upon Concept: Special Purpose P-n Junction Diodes.
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