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Author Question: Explain why the observable properties of quasars imply that they are objects from the early Universe ... (Read 56 times)

bobthebuilder

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Explain why the observable properties of quasars imply that they are objects from the early Universe controlled by supermassive black holes.
 
  What will be an ideal response?

Question 2

The visible surface of the Sun is composed of solid matter.
 
  a. True
  b. False
  Indicate whether the statement is true or false



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ebe

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Answer to Question 1

Quasars have continuous spectra with emission lines of hydrogen. The emission lines display very high redshifts, often greater than 1.0 . The high redshifts are proof that quasars are very distant. A large distance is associated with a long look-back time, so quasars must come from the early Universe.

In order to be visible at such large distances, quasars must be very luminous. The luminosity of a quasar can vary in very short times, sometimes as short as a few hours. The rapid fluctuations show that quasars are small objects, smaller than our Solar System. The only reasonable explanation for a compact, fluctuating high-luminosity source is a supermassive black hole.

Answer to Question 2

False




bobthebuilder

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Reply 2 on: Jul 27, 2018
:D TYSM


parker125

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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