A Treatise on OpticsLea & Blanchard, 1844 - 418 Seiten |
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angle of incidence aperture axes axis of double beam blue bodies bright caustic centre CHAP common light concave lens converging rays convex lens crown glass crystals curve diameter direction dispersive power double refraction equal equation extreme ray farther flint glass focal distance focal length formula fringes green heat Iceland spar inch incident rays inclination index of refraction lenses negative object glass optical orange parallel rays pencil of rays perpendicular phenomena placed plane of polarization plane of reflexion plano-convex lens polarized light polarizing angle positive principal focus prism produced PROP radiant point radius reflected pencil reflected rays refractive power retina rhomb second surface seen shown in fig small pencil spectrum speculum spherical aberration suppose system of rings telescope thickness tint tion transmitted vergency vertex whence white light yellow
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Seite 34 - It may also be defined as the sine of the angle of incidence divided by the sine of the angle of refraction, as light passes from air into the substance.
Seite 143 - Massinger is one of the most interesting as well as one of the most...
Seite 95 - ... parts, the orange 27, the yellow 48, the green 60, the blue 60, the indigo 40, and the violet 80...
Seite 104 - ... a grooved structure, like the delicate texture of the skin at the top of an infant's finger, or like the section of the annual growths of wood as seen upon a dressed plank of fir. These may sometimes be seen by the naked eye ; but they are often so minute that 3,000 of them are contained in an inch.
Seite 221 - French coast, which is about 40 or 50 miles distant, as distinctly as through the best glasses. The sailors and fishermen could not at first be persuaded of the reality of the appearance ; but as the cliffs gradually appeared more elevated, they were so convinced that they pointed out and named to Mr. Latham the different places which they had been accustomed to visit: such as the bay, the windmill at Boulogne, St.
Seite 226 - ... the primary bow. On the outside of the outer or secondary bow, I saw distinctly a red arch, and beyond it a very faint green one, constituting a supernumerary bow, analogous to those within the primary rainbow.
Seite 137 - ... left, or on any other side of it, provided that in all these cases it falls upon the surface in the same manner, or, what amounts to the same thing, the beam of solar light has the same properties on all its sides; and this is true, whether it is white light as directly emitted from the sun, or whether it is red light, or light of any other colour.
Seite 255 - With the aid of these facts, the theory of accidental colors will be readily understood. When the eye has been for some time fixed on the red wafer, the part of the retina occupied by the red image is strongly excited, or, as it were, deadened by its continued action.
Seite 68 - ... the middle of the red space, the whole of the orange, a great part of the green, a considerable part of the blue, a little of the indigo, and a very little, of the violet...
Seite 219 - ... numberless series of pilasters, arches, castles well delineated, regular columns, lofty towers, superb palaces, with balconies and windows, extended alleys of trees, delightful plains with herds and flocks, armies of men on foot and horseback, and many other strange images, in their natural colours and proper actions, passing rapidly in succession along the surface of the sea...