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Author Question: Star A and star B both have an apparent magnitude of 7.0, but star A is at a distance of 15 pc and ... (Read 103 times)

fox

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on: Jul 27, 2018
Star A and star B both have an apparent magnitude of 7.0, but star A is at a distance of 15 pc and star B is at a distance of 30 pc. Which statement below is correct?
 
  A) Star A appears brighter than star B, but star B and star A have the same intrinsic brightness.
  B) Star B appears brighter than star A, but star B and star A have the same intrinsic brightness.
  C) Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A.
  D) Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B.
  E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.

Question 2

Radio dishes are large in order to:
 
  A) attract funding from NASA and the NSF.
  B) give greater magnification.
  C) increase their angular resolution and collect the very weak radio photons.
  D) increase the range of waves they can collect.
  E) detect shorter waves than optical telescopes for superior resolution.


akudia

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

C

Answer to Question 2

C


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fox

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Reply #2 on: Jul 27, 2018
TY


akudia

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


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