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

Author Question: According to modern science, approximately how old is the Sun? A) 25 million years B) 10,000 ... (Read 34 times)

drink

  • Hero Member
  • *****
  • Posts: 554
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?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

milbourne11

  • Sr. Member
  • ****
  • Posts: 322
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.




milbourne11

  • Sr. Member
  • ****
  • Posts: 322

 

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

For a complete list of videos, visit our video library