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Author Question: Two stars have apparent magnitudes of 0 and 5. If both stars are 117 parsecs away, which star is ... (Read 58 times)

student77

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on: Jul 27, 2018
Two stars have apparent magnitudes of 0 and 5. If both stars are 117 parsecs away, which star is intrinsically brighter and by what factor is it brighter than the other?
 
  What will be an ideal response?

Question 2

After a supernova explosion, the remains of the stellar core
 
  A) will always be a neutron star.
  B) be either a neutron star or a black hole.
  C) will always be a black hole.
  D) may be either a white dwarf, neutron star, or black hole.


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jordangronback

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

Since both stars are at the same distance (it does not matter what the distance is), the magnitude 0 star is the brightest. It is intrinsically 100 times brighter than the magnitude 5 star because 5 magnitudes is always a factor of 100 in intrinsic brightness.

Answer to Question 2

B


student77

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

upturnedfurball

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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