Which one of the following telescopes contains only mirrors ?
Galilean telescope
Keplerian telescope
Newtonian telescope
Schmidt telescope
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC NDA-1 – 2023
– Galilean and Keplerian telescopes are types of refracting telescopes, using lenses.
– A Newtonian telescope is a type of reflecting telescope, using mirrors (a primary parabolic mirror and a secondary flat mirror).
– A Schmidt telescope (e.g., Schmidt-Cassegrain) uses both a corrector plate (lens) and mirrors.
– The question asks for a telescope containing *only* mirrors in its main optical path for image formation.