A primary mirror (or primary) is the principal light-gathering surface (the objective) of a reflecting telescope.
Read more about Primary Mirror: Description, Superlative Primary Mirrors
Famous quotes containing the words primary and/or mirror:
“At the heart of the educational process lies the child. No advances in policy, no acquisition of new equipment have their desired effect unless they are in harmony with the child, unless they are fundamentally acceptable to him.”
—Central Advisory Council for Education. Children and Their Primary Schools (Plowden Report)
“I have had no other treasure in this world than to see you once perfect and complete, as much in virtue, honesty and wisdom, as in all free and honest learning, and so leave you after my death like a mirror representing my person—your father—if not as excellent in fact as I would wish, certainly so in desire.”
—François Rabelais (1494–1553)