The Mechanism That Appears to Generate Two Extensive Regions of Radio

question 110

Multiple Choice

The mechanism that appears to generate two extensive regions of radio emission near active galaxies is

• A) two very hot gas clouds, suspended by magnetic fields above the rotation axis of a galaxy, emitting 21-cm radio waves.
• B) a radio source split by a dark absorbing disk across its center as seen from Earth.
• C) the double image of a single source behind the galaxy produced by gravitational lensing by the galaxy.
• D) two oppositely directed jets of energetic particles that collide with intergalactic gas.

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Definitions:

Generativity

A concern for establishing and guiding the next generation, typically expressed through parenting, teaching, and community involvement.

Industry

The sector of the economy concerned with production, manufacturing, and distribution of goods and services.

Initiative

The ability to assess and begin tasks independently without needing external motivation or pressure.

Integrity

The quality of being honest and having strong moral principles.