In the Unified Model of Active Galaxies,the Main Difference Among

question 397

Multiple Choice

In the unified model of active galaxies,the main difference among quasars,BL Lacertae objects,and radio galaxies appears to be that:

• A) we see the accretion disk around the central black hole from a different angle in each case-face-on for BL Lacertae, edge-on for radio galaxies, and in between for quasars.
• B) the rate at which matter is falling into the central black hole is different in each case-largest in quasars, less in BL Lacertae objects, and least in radio galaxies.
• C) the mass of the central black hole is different in each case-largest in quasars, less in BL Lacertae, and least in radio galaxies.
• D) the galaxy type with which they are associated is different in each case-spiral for BL Lacertae, elliptical for quasars, and irregular for radio galaxies.

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