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

question 7

Multiple Choice

Light-emitting diodes contain semiconductors that emit light when a current is passed through them.What is the key factor in determining 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:

Curds

The solid parts of milk that coagulate during the cheese-making process, separating from the liquid (whey).

Whey

A liquid byproduct of cheese production, which is used in food products and supplements, especially for its protein content.

Income

The financial gain received by an individual or entity, typically measured per period, from work, investments, or business ventures.

Utility Function

A mathematical representation in economics that captures the level of satisfaction or happiness that consumers derive from consuming goods and services.