The practical astronomer : comprising illustrations of light and colours, practical descriptions of all kinds of telescopes, the use of the equatorial-transit, circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomy (1845)
Dick, Thomas, 1774-1857 · London : Seeley, Burnside, and Seeley · leaf 109
which the rays cometo us last. Thus, if AB (fig, 15) represent aplane mirror, the image of an object C appears tothe eye at E behind the mirror, in the directionEG, and always in the intersection G of the per-pendicular CG, and the reflected ray EG—andconsequently at G as far behind the mirror, as… … equal and similar to the whole object, and has alike situation with respect to one side of the plane,that the object has with respect to the other. Mr. Walker illustrates the manner in which wesee our faces in a mirror by the following figure (16).ab represents a mirror, and oc, a person…
Astronomy · Astronomical instruments · Telescopes
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
