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Author Question: 21-cm radio waves allow us to map the distribution of hydrogen in spiral arms on the opposite side ... (Read 47 times)

tiffannnnyyyyyy

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on: Jul 27, 2018
21-cm radio waves allow us to map the distribution of hydrogen in spiral arms on the opposite side of the Galaxy.
 
  Indicate whether the statement is true or false

Question 2

Name the four types of reflector designs.
 
  What will be an ideal response?


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bfulkerson77

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

TRUE

Answer to Question 2

prime focus, Newtonian, Cassegrain, and Coude


tiffannnnyyyyyy

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

xiazhe

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Reply 3 on: Yesterday
:D TYSM

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