The Gap Between the Valence and Conduction Bands of a Certain

question 4

Multiple Choice

The gap between the valence and conduction bands of a certain semiconductor is 0.85eV.When this semiconductor is used to form a light emitting diode, the wavelength of the light emitted:

• A)is in a range above 1.5 * 10^-6 m
• B)is in a range below 1.5 *10^-6 m
• C)is always 1.5 *10^-6 m
• D)is in a range centered on 1.5 *10^-6 m
• E)has nothing to do with the gap

Relate the impact of varied study conditions on memory performance.

Understand the structure and depth of limit order books in different stock markets.

Calculate the rate of return on investments with margin transactions.

Identify major regulatory bodies and their roles in securities markets in the United States.

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Definitions:

Price

The amount of money expected, required, or given in payment for something. It serves as a signal between buyers and sellers in a market.

Labor

The human effort, both physical and mental, used in the production of goods and services.

Substitution Effect

The change in quantity demanded of a good or service as consumers switch to or from substitutes when the price changes.

Income Effect

The change in an individual's or economy's income and how that change will impact the quantity demanded of a good or service.