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Author Question: Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 ... (Read 81 times)

tfester

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on: Jul 27, 2018
Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 nm. Is the star moving toward or away from us, relative to the line of sight? How fast is it moving? (Hint: c = 300,000 km/s)
 
  a. toward; 300 km/s
  b. away; 300 km/s
  c. at rest; 0 km/s
  d. sideways; 300 km/s
  e. toward; 150 km/s

Question 2

The Sun traces a path along the ecliptic in a period that is longer than 365 days.
 
  a. True
  b. False
  Indicate whether the statement is true or false


Silverbeard98

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

a

Answer to Question 2

True


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tfester

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Reply #2 on: Jul 27, 2018
Thanks


Silverbeard98

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Reply #3 on: Jul 27, 2018
Welcome :)


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