Worksheet: Telescopes

In this worksheet, we will practice explaining the way that telescopes are used to observe distant objects.

Q1:

Which of the following would be the best location for a telescope used to study objects very far from Earth?

  • AAt sea level
  • BAt the bottom of a deep hole
  • CIn Earth’s orbit
  • DOn a mountain top

Q2:

Which of the following would improve the imaging abilities of a reflecting telescope?

  • AAdding a concave lens between the telescope’s mirrors
  • BMaking the telescope longer
  • CAdding a convex lens between the telescope’s mirrors
  • DIncreasing the size of the telescope’s primary mirror

Q3:

Which of the following would improve the imaging abilities of a refracting telescope?

  • AAdding a mirror at the focal point of the lenses
  • BMaking the telescope longer
  • CIncreasing the size of the eyepiece lens
  • DIncreasing the size of the telescope’s objective lens

Q4:

An astronomer looks at the night sky with her naked eye and sees the stars shown in the diagram. If the astronomer uses a telescope to look at these stars, which of the following diagrams correctly represents what she would see?

  • A
  • B
  • C
  • D
  • E

Q5:

The diagram shows a radio telescope and a reflecting telescope. Radio telescopes use radio waves rather than visible light.

Which part of a radio telescope has an equivalent function to the primary mirror of a reflecting telescope?

  • ASubreflector
  • BParabolic dish
  • CRadio receiver

Which part of a radio telescope has an equivalent function to the secondary mirror of a reflecting telescope?

  • ASubreflector
  • BRadio receiver
  • CParabolic dish

Which part of a radio telescope has an equivalent function to the eyepiece lens of a reflecting telescope?

  • ASubreflector
  • BParabolic dish
  • CRadio receiver

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