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Author Question: According to modern science, approximately how old is the Sun? A) 25 million years B) 10,000 ... (Read 20 times)

drink

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on: Jul 27, 2018
According to modern science, approximately how old is the Sun?
 
  A) 25 million years B) 10,000 years C) 400 million years D) 4.5 billion years

Question 2

Explain why an absorption line spectrum is not filled back in (to make the original continuous spectrum) by the photons that are emitted as the excited electrons decay back down to their original energy levels.
 
  What will be an ideal response?


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milbourne11

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

The photons emitted by the decays are emitted in random directions. Hence only a fraction of them are sent back in their original direction towards us.


drink

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Reply #2 on: Jul 27, 2018
Thank you!


milbourne11

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Reply #3 on: Jul 27, 2018
Always glad to help...


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