This topic contains a solution. Click here to go to the answer

Author Question: Discuss the problems of the big bang model. What will be an ideal ... (Read 50 times)

jc611

  • Hero Member
  • *****
  • Posts: 552
Discuss the problems of the big bang model.
 
  What will be an ideal response?

Question 2

Which of the following is true of the light emitted by the big bang gases?
 
  A) It is detectable with infrared telescopes.
  B) It can no longer be used to detect the big bang.
  C) It is not detectable with radio telescopes.
  D) It can be seen with the unaided eye.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

recede

  • Sr. Member
  • ****
  • Posts: 315
Answer to Question 1

By 1980, the big bang model was widely accepted, but it faced two problems that led to the development of an improved theory-a big bang model with an important addition.One of the problems is called the flatness problem. The curvature of space-time seems to be near the transition between an open and a closed Universe. That is, the Universe seems approximately flat. It seems peculiar that the actual density of the Universe is anywhere near the critical density that would make it flat. To be so near critical density now, the density of the Universe during its first moments must have been very close, within 1 part in 1049, of the critical density. So, the flatness problem is: Why was the Universe so close to exactly flat, with no space-time curvature, at the time of the big bang?The second problem with the original big bang theory is called the horizon problem. When astronomers correct for the motion of Earth, they find that the cosmic microwave background (CMB) is very isotropic, the same in all directions to a precision of better than 1 part in 1000. Yet, background radiation coming from two points in the sky separated by more than an angle of one degree is from two parts of the big bang far enough apart that they should not have been connected at any previous time. That is, when the CMB photons were released, the Universe was not old enough for energy to have traveled at the speed of light from one of those regions to the other-the regions should always have been beyond each other's horizon and could not have exchanged heat to make their temperatures equal. So, the horizon problem is: How did every part of the observable Universe get to be so nearly the same temperature by the time of recombination?

Answer to Question 2

A




jc611

  • Member
  • Posts: 552
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it


  • Member
  • Posts:
Reply 3 on: Yesterday
Gracias!

 

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

For a complete list of videos, visit our video library