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 154
ill consequently paintor tinge the object with colours. The edges ofevery convex lens approach to this form, and it ison this account that the extremities of objectswhen viewed through them are found to be tinged ON THE COLOURS OF LIGHT. 129 with the prismatic colours. In such a glass, there-fore,… … B lens, and OB an object at some distance from it.If the object OB was of a pure red colour, therays proceeding from it would form a red imageat Rr ; if the object was of a violet colour, animage of that colour would be formed at Vv,nearer the lens ; and if the object was white orany other…
Astronomy · Astronomical instruments · Telescopes
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