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Author Question: How did Hubble use the cosmological redshift to determine distance? What will be an ideal ... (Read 25 times)

penza

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on: Jul 27, 2018
How did Hubble use the cosmological redshift to determine distance?
 
  What will be an ideal response?

Question 2

The signature of a planet is largest in radial velocity measurements when the planet and star are lined up along the line of sight to the telescope.
 
  Indicate whether the statement is true or false


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ilianabrrr

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

The redshift is caused by the Doppler effect as a result of the galaxy's velocity. Hubble found that when known galactic distances (determined with a standard candle) were plotted with the recessional velocity, all the data fell on a straight line. The slope of this line is Hubble's constant. This allowed him to use a measured redshift (or calculated velocity) to read the distance off the plot, or to use the equation to calculate the distance.

Answer to Question 2

TRUE


penza

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Reply #2 on: Jul 27, 2018
TY


ilianabrrr

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Reply #3 on: Jul 27, 2018
You're welcome


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