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:
“Parental attitudes have greater correlation with pupil achievement than material home circumstances or variations in school and classroom organization, instructional materials, and particular teaching practices.”
—Children and Their Primary Schools, vol. 1, ch. 3, Central Advisory Council for Education, London (1967)
“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)