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 123
your hand towards either side, the hand of theimage will move towards the other side; the imagemoving always in a contrary direction to the ob-ject. All this while the by-standers, if any, seenothing of the image, because none of the reflectedrays that form it can enter their eyes,—The fol-lowing… … B In this case, an inverted image of the hand isformed which is seen hanging in the air at M. The ON THE REFLECTION OF LIGHT. 99 rays c and d go diverging from the two oppositepoints of the object, and by the action of themirror, they are again made to converge to pointsat o and s where they cross,…
Astronomy · Astronomical instruments · Telescopes
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