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

Author Question: Briefly explain why spectral lines are useful in determining the temperature of their source. ... (Read 49 times)

Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
Briefly explain why spectral lines are useful in determining the temperature of their source.
 
  What will be an ideal response?

Question 2

In principle, if we could see all the way to the cosmological horizon we could see the Big Bang taking place. However, our view is blocked for times prior to about 380,000 years after the Big Bang. Why?
 
  A) Before that time, the universe was too crowded with stars.
  B) Before that time, the gas in the universe was dense and ionized and therefore did not allow light to travel freely.
  C) Before that time, the universe was dark so there was no light to illuminate anything.
  D) 380,000 years after the Big Bang marks the time when stars were first born, and thus began to shine the light by which we can see the universe.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dantucker

  • Sr. Member
  • ****
  • Posts: 346
Answer to Question 1

Different ionization states of the same element have different sets of spectral lines. Thus, we can identify the ionization state, which tells us about the temperature because higher temperatures are required to reach higher ionization states.

Answer to Question 2

B




Mr. Wonderful

  • Member
  • Posts: 866
Reply 2 on: Jul 27, 2018
:D TYSM


kalskdjl1212

  • Member
  • Posts: 353
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

For a complete list of videos, visit our video library