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 108
FDrepresent the incident ray from any object, then ON THE REFLECTION OF LIGHT. 83 DE will be the reflected ray, thrown back in thedirection from D to E, and it will make with theperpendicular CD the same angle which the inci-dent ray FD did with the same perpendicular, thatis, the angle FDC will be… … In viewing objects by reflection we see them ina different direction from that in which they reallyare, namely, along the line in 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…
Astronomy · Astronomical instruments · Telescopes
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