One of the "Quiet" Bands in the Electromagnetic Spectrum Used

question 68

Multiple Choice

One of the "quiet" bands in the electromagnetic spectrum used for SETI is the so-called "water hole" between about 10³ and 10⁴ MHz.What is the principal source of the natural signals in this frequency band?

• A) emissions from the water molecule
• B) emissions from oxygen molecules
• C) cosmic microwave background radiation
• D) radio emission from terrestrial sources

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Definitions:

Coase Theorem

A principle that if private parties can bargain without cost over the allocation of resources, they can solve the problem of externalities on their own, leading to an efficient outcome.

Property Rights

The legal rights to use, control, and derive benefits from a property or resource.

Externality

A consequence of an economic activity experienced by unrelated third parties; it can be either positive or negative.

External Costs

External costs, or negative externalities, are costs that are not borne by the parties directly involved in a transaction or activity but are imposed on third parties or society at large, such as pollution.