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)
“Commitment, by its nature, frees us from ourselves and, while it stands us in opposition to some, it joins us with others similarly committed. Commitment moves us from the mirror trap of the self absorbed with the self to the freedom of a community of shared values.”
—Michael Lewis (late 20th century)