Question :
61.What was the first evidence that quasars were different from : 1777268
61.What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths?
A.The first quasars were seen to have fuzz.
B.Quasars emitted radio energy like active galaxies, but appeared to be point sources in radio wavelengths.
C.Quasars showed significant gravitational lens effects.
D.The spectra of quasars looked like that of an M dwarf.
E.The large red shifts originally indicated that they were orbiting the center of the Milky Way.
62.Evidence that supports quasars being the nuclei of very distant galaxies includes
A.the existence of quasar fuzz.
B.the observation of a supernova near a quasar whose distance from its brightness is consistent with the large redshift.
C.gravitational lensing of some quasars by nearby galaxies.
D.all of the above
E.none of the above
63.According to the unified model of active galactic nuclei, a ____________ is observed if our line of sight is parallel to the plane of the dense disk of an active galactic nucleus.
A.blazar
B.Type 1 Seyfert
C.Type 2 Seyfert
D.superluminal expansion
E.quasar
64.A BL Lac object is the same as a
A.Type 1 Seyfert.
B.Type 2 Seyfert.
C.double-lobed radio galaxy.
D.blazar.
E.quasar.
65.__________ is (are) observed when light from a distant quasar travels past a massive galaxy between us and the quasar, and this light is focused to form two or more images of the same quasar.
A.A double-lobed radio galaxy
B.Superluminal expansion
C.The gravitational lens effect
D.A blazar
E.Gravitational waves
66.__________ show(s) that some quasars are further away than distant galaxies and that space time is curved by massive objects.
A.Double-lobed radio galaxies
B.Blazars
C.The gravitational lens effect
D.Head-tail galaxies
E.Superluminal expansion
67.Seyfert galaxies
A.are more common in close pairs of galaxies than in isolated systems.
B.emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies.
C.generally show red shifts greater than 6.
D.a and b
E.a, b and c
68.Quasars are most common with red shifts
A.less than 0.1
B.less than 0.5
C.of about 2
D.greater than 6
E.greater than 8
69.In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus is
A.composed of clouds of gas and stars moving at very high orbital velocities near a supermassive black hole.
B.composed of a super massive black hole surrounded with empty space
C.responsible for producing the bright continuous radiation from within the event horizon.
D.responsible for the narrow absorption lines seen in Type 2 Seyfert galaxies.
E.located far from the core beyond the disk of stars of the galaxy
70.The unified model describes active galactic nuclei using
A.a super massive black hole at the center of a normal spiral galaxy.
B.a super massive black hole surrounded by an accretion disk and dense disk of gas.
C.an accretion disk around a neutron star.
D.gravitational lenses to intensify the radiation coming from them.
E.different lines of sight toward and dwarf irregular galaxy.
