According to the unified model calculations, if you look directly into the central cavity around the black hole of a galaxy, you would see a:
A) very luminous source with few or no emission lines.
B) large Doppler shift with broad spectral lines.
C) small Doppler shift with narrow spectral lines.
D) jet emerging parallel to the accretion disk.
A
You might also like to view...
The specific heat capacity of water is about twice the specific heat capacity of ice. The amount of heat required to raise the temperature of 1 kg of water 10°C is __________ times the amount of heat required to raise the temperature of 1 kg of ice 10°C
Fill in the blank(s) with correct word
What is the electron configuration for ground state Li, which has 3 electrons?
A) 1s3 B) 1s12s2 C) 1s22s1 D) 1s21p1 E) 1s11p2
Tides are caused because different parts of the earth's oceans are at different distances from the moon
Indicate whether the statement is true or false
Electric Field of Point-Charges: Three equal negative point charges -q are placed at three of the corners of a square of side d as shown in the figure. Which one of the arrows shown represents the direction of the net electric field at the vacant corner of the square?
A. A B. B C. C D. D