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Author Question: The hydrogen lines in spectral type A stars a. are most narrow for supergiants. b. are most ... (Read 75 times)

dalyningkenk

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on: Jul 27, 2018
The hydrogen lines in spectral type A stars
 
  a. are most narrow for supergiants.
  b. are most narrow for main-sequence stars.
  c. can not be used to estimate the luminosity of the star.
  d. are very weak and difficult to see.
  e. are useful in determining the apparent magnitude of the star.

Question 2

The ____ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
 
  a. light-gathering power
  b. focal length
  c. magnifying power
  d. resolving power
  e. spherical aberration


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batool

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

a

Answer to Question 2

d


dalyningkenk

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Reply 2 on: Jul 27, 2018
:D TYSM

frankwu0507

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Reply 3 on: Yesterday
Wow, this really help

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