How Is the Energy That Powers Radio Galaxies, Quasars, and Other

question 142

Multiple Choice

How is the energy that powers radio galaxies, quasars, and other active galactic nuclei produced?

• A) by nuclear fusion near a central black hole
• B) by magnetic fields that trap and accelerate charged particles, which then radiate large amounts of energy
• C) by matter that has been converted to pure energy by interacting with the jets shot out by a central black hole
• D) by gravity, which converts the potential energy of matter falling toward a central black hole into kinetic energy, which is then converted to thermal energy by collisions among the particles of matter
• E) by matter-antimatter annihilation near a central black hole

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