« previous next »

Author Question: A _____ is an electronic device consisting of a large array of light-sensitive elements used to ... (Read 32 times)

panfilo

  • Hero Member
  • *****
  • Posts: 572
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

  • Sr. Member
  • ****
  • Posts: 364
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Large numbers of plant species can flower at once in this grassland in Kinsella, Alberta. Large numbers of plant species can flower at once in this grassland in Kinsella, Alberta.
By reflecting most visible light, snow creates a much cooler microclimate than nearby bare ground. By reflecting most visible light, snow creates a much cooler microclimate than nearby bare ground.
How noncyclic electron flow during the light reactions generates ATP and NADPH. How noncyclic electron flow during the light reactions generates ATP and NADPH.
moon light moon light
Many electronic components are used to construct a typical vehicle computer. Notice the quantity of ... Many electronic components are used to construct a typical vehicle computer. Notice the quantity of ...
Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation. Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation.
Video: Protein Secondary and Tertiary Structures - Animation

For a complete list of videos, visit our video library