8.4-m Mirror Blank for Large Binocular Telescope. Polishing one LBT 8.4-m mirror. TELESCOPES. Palomar 200-in. The Electromagnetic Spectrum. Functions of Telescopes. Collect more light --- depends on (diam) 2 Resolve sources better (see more detail) Magnify images.
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Purpose: form an accurate representation of original scene at a “focus”
Minimum 2 lenses needed for visual use
Place detector here
Longer focal lengths reduce chromatic & spherical aberration (Hevelius, ca. 1650)
in a large telescope. Image size/motion caused by
(Largest equatorial mount for
optical telescope; "horseshoe")