A Cassegrain telescope uses two mirrors as shown in above figure. Such a telescope is built with the mirrors 20mm apart. If the radius of curvature of the large mirror is 220mm
Cassegrain reflecting telescope, 1762-1774 | Science Museum Group Collection
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Cassegrain reflecting telescope, 1762-1774 | Science Museum Group Collection
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A Cassegrain telescope uses two mirrors as shown in the above figure. Such a telescope is built with the mirrors $20mm$ apart. If the radius of curvature of the large mirror is
File:Cassegrain-Telescope.jpg - Wikipedia
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