Which of the Following Is Not a Piece of Evidence

question 25

Multiple Choice

Which of the following is not a piece of evidence supporting the conclusion that active galactic nuclei are powered by accretion disks around massive black holes?

• A)Radio observations sometimes show long jets of material that can extend millions of light- years out from the galactic center.
• B)Spectral lines from the galactic center indicate that clouds of gas are orbiting a central object at very high speed.
• C)Infrared observations show that many stars are forming near the centers of active galaxies.
• D)The total amount of radiation coming from the galactic center can, in some cases, exceed 100 times the total luminosity of the Milky Way Galaxy.
• E)Observed radiation from the galactic center can vary significantly in brightness in times as short as a few days.

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A method of learning in which information is analyzed meaningfully and in detail to aid in its retention and understanding.

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