Which one of the following telescopes contains only mirrors ?

  1. A. Galilean telescope
  2. B. Keplerian telescope
  3. C. Newtonian telescope
  4. D. Schmidt telescope

Correct Answer: C. Newtonian telescope

Explanation

The Newtonian telescope is a reflecting telescope, which means it uses a primary and a secondary mirror to form an image, unlike refracting telescopes that use lenses.

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