The Cosmic Background Radiation Is

question 61

Multiple Choice

The cosmic background radiation is

• A) the flux of visible radiation in empty space, contributed by all visible stars in the universe.
• B) the radio noise generated by Earthbound transmitters, spreading out into space since about 1920.
• C) the beam of atomic nuclei known as cosmic rays that continuously rain down on Earth from all directions in space.
• D) low-intensity radio noise, with a 3 K blackbody temperature, almost uniform in intensity in all directions.

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Definitions:

Social Mobility

The movement of individuals, families, or groups through a system of social hierarchy or stratification.

Lifetime

The period of time that an individual is alive, often used to denote the duration of a person's existence or a product's usefulness.

Socioeconomic Status

A social standing or classification of individuals and groups based on factors like income, education, and occupation, which influences access to resources and opportunities.

Working-Class Woman

A female belonging to the social group that is primarily engaged in manual labor or blue-collar jobs, and is often considered lower in socioeconomic status.