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Author Question: The H line has a wavelength of 410.2 nm when observed in the laboratory. If the H line appears in a ... (Read 53 times)

CBme

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on: Jul 27, 2018
The H line has a wavelength of 410.2 nm when observed in the laboratory. If the H line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?
 
  a. 146 km/s away from the observer
  b. 146 km/s toward the observer
  c. 6.0  107 m/s away from the observer
  d. 6.0  107 m/s toward the observer
  e. The radial velocity of the star cannot be determined from this information.

Question 2

Choose the correct word(s) that make the statement true. A (lunar, solar) eclipse occurs when the Moon is (new, quarter, gibbous, full) and the ordering of aligned celestial objects is always Sun, Earth, Moon.
 
  What will be an ideal response?


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Eazy416

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

b

Answer to Question 2

lunar, full


CBme

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


Eazy416

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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