Which of these optical elements or combinations make up a Newtonian telescope?
A) two curved mirrors, one concave, the second convex
B) two lenses, to produce an image the correct way around
C) one concave and one flat mirror
D) one concave focusing mirror

Question

Quizplus · Accepted Answer

A Newtonian telescope utilizes a primary concave mirror to gather and focus light, and a secondary flat mirror to reflect the focused light to an eyepiece, making option C correct.

Which of These Optical Elements or Combinations Make Up a Newtonian