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Author Question: A _____ is an electronic device consisting of a large array of light-sensitive elements used to ... (Read 68 times)

panfilo

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on: Jul 27, 2018
A _____ is an electronic device consisting of a large array of light-sensitive elements used to record very faint images.
 
  A) photometer
  B) charge-coupled device
  C) spectrograph
  D) photographic plate

Question 2

The light-gathering power of a telescope is directly proportional to the:
 
  A) square of the diameter of the primary mirror or lens.
  B) cube of the diameter of the primary mirror or lens.
  C) square of the focal length of the primary mirror or lens.
  D) cube of the radius of curvature of the primary mirror or lens.


ansleighelindsey

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

B

Answer to Question 2

A


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