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Author Question: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy ... (Read 48 times)

rmenurse

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on: Jul 29, 2018
The wavelength of a ruby laser is 694.3 nm.
 
  What is the energy difference between the two energy states involved in laser action? (c = 2.9979  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.6022  10-19 J)
  A) 1.537 eV
  B) 1.646 eV
  C) 1.786 eV
  D) 1.812 eV
  E) 3.572 eV

Question 2

According to the second law of thermodynamics, the entropy of any system always increases.
 
  A) True B) False


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steff9894

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

B


rmenurse

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

aliotak

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Reply 3 on: Yesterday
Excellent

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