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Author Question: What role does helium play in spectral classification? What will be an ideal ... (Read 45 times)

student77

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on: Jul 27, 2018
What role does helium play in spectral classification?
 
  What will be an ideal response?

Question 2

A quasar's spectrum is hugely redshifted. What does this large redshift tells us about the quasar?
 
  A) the composition of the quasar
  B) the size of the quasar's central, supermassive black hole
  C) the distance to the quasar
  D) the type of host galaxy in which the quasar resides


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JaynaD87

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

It is ionized in the hottest O class stars, and prominent but neutral in B class stars; in cooler stars, it is not noted.

Answer to Question 2

C


student77

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

nguyenhoanhat

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Reply 3 on: Yesterday
Wow, this really help

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