Light-Emitting Diodes Are Semiconductors That Emit Light When a Current

question 4

Multiple Choice

Light-emitting diodes are semiconductors that emit light when a current is passed through them. What is the key factor that must be changed to change the wavelength of the emitted light in an LED?

• A)the width of the valence band
• B)the width of the conduction band
• C)the width of the band gap
• D)the magnitude of the current
• E)the type of semiconductor (p vs.n)

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Definitions:

Perceived Competence

An individual's belief in their own ability to perform tasks effectively and successfully.

Feedback Self-efficacy

The belief in one’s capacity to accept and utilize feedback for improvement and learning.

Supportive Communication

Communication that is empathetic, understanding, and encouraging, aimed at providing emotional support to others.

Defensiveness

A psychological reaction that occurs when an individual perceives a threat or criticism, often leading to protective behavior or communication.