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Author Question: Suppose that Star X and Star Y both have redshifts, but Star X has a larger redshift than Star Y. ... (Read 619 times)

DelorasTo

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on: Jul 27, 2018
Suppose that Star X and Star Y both have redshifts, but Star X has a larger redshift than Star Y. What can you conclude?
 
  A) Star X is moving away from us faster than Star Y.
  B) Star X is hotter than Star Y.
  C) Star Y is moving away from us faster than Star X.
  D) Star X is moving away from us and Star Y is moving toward us.
  E) Star X is coming toward us faster than Star Y.

Question 2

Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude?
 
  A) The star is getting hotter. B) The star is getting colder.
  C) The star is moving toward us. D) The star is moving away from us.


yasmin

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

A

Answer to Question 2

C


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DelorasTo

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


yasmin

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


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