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Author Question: The main lens or mirror of a telescope is called the ____________________. Fill in the blank(s) ... (Read 70 times)

vicotolentino

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on: Jul 27, 2018
The main lens or mirror of a telescope is called the ___________________ _.
 
  Fill in the blank(s) with correct word

Question 2

Hydrogen Balmer lines are strongest near ____ spectral class whereas ionized Calcium (CaII) lines are strong in ___ stars.
 
  a. A0, K b. O5, M5
  c. M5, G1 d. M0, B0


31809pancho

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

primary lens or mirror

Answer to Question 2

a


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