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The winter sunrise was painting the east; and as the window was to the back of the house, it shone into the room with many strange colours of refracted light. Without, the houses were all cleanly roofed with snow; the garden walls were coped with it a foot in height; the greens lay glittering.
"I've been lookin' for a likely man this long while, and now that he's shown up it seems to me I got a right to give him the hang of what happened." The small woman made no reply, but set her thin lips in a needle- like line. She gazed straight before her at the Tower of Jewels with so austere an expression that no glint of refracted sunlight could soften it.
Terrestrial refraction is the same thing, occurring whenever there is a difference of density in the aerial strata. The atmosphere absorbs some portion of the light which it receives. It is not all reflected or refracted or even penetrative. Objects seen under various degrees of light, either convected or retarded by different media, appear near or distant, distinct or confused.
I think it must be either this or the frost that accounts for the extraordinary prevalence of red noses in Russia, and it even occurred to me that the stations are painted a fiery red, so that when travelers come within range of the refracted color their noses may look pale by contrast, and thereby remind them that it is time to renew the caloric.
"If A B C is an object placed before a convex lens, L L, every point of it will send forth rays in all directions; but, for the sake of simplicity, suppose only three points to give out rays, one at the top, one at the middle, and one at the bottom; the whole of the rays then that proceed from the point A, and fall on the lens L L, will be refracted and form an image somewhere on the line A G E, which is drawn direct through the centre of the lens; consequently the focus E, produced by the convergence of the rays proceding from A, must form an image of A, only in a different relative position; the middle point of C being in a direct line with the axis of the lens, will have its image formed on the axis F, and the rays proceeding from the point B will form an image at D; so that by imagining luminous objects to be made up of all infinite number of radiating points and the rays from each individual point, although falling on the whole surface of the lens, to converge again and form a focus or representation of that point from which the rays first emerged, it will be very easy to comprehend how images are formed, and the cause of those images being reversed.
Once more again before the travellers' eyes the Moon's disc revealed itself in all the old familiar features so characteristic of lunar landscapes no blending of tones, no softening of colors, no graduation of shadows, every line glaring in white or black by reason of the total absence of refracted light.
Now if the vessel is filled with water, light-rays emerging from it are held to be refracted, so that rays from the points hitherto invisible also meet the eye, which is still in its original position. Hence, it sees P in the position of P'. This is thought to be the origin of the impression that the whole bottom of the vessel is raised.
Then he remembered a curious trick of refracted light he had once seen in the sunrise on Mount Washington, and suddenly he found himself asking Miss Denham if she were acquainted with the interior of New Hampshire. Flemming had put the interrogation without a shadow of design; he could have bitten his tongue off an instant after. Lynde, who had been discussing with Mrs.
Within a minute or two she found herself sitting in one of his big, shabby arm-chairs saying things preliminary to confidence. It was a large room, with windows on three sides, through which the light poured in to find itself refracted by a hundred lustrous surfaces.
If the rays of the sun are refracted by means of a lens, and the image received on a screen placed between C and o, so as to cut the cone L a l L, a luminous circle will be formed on the paper, only surrounded by a red border, because it is produced by a section of the cone L a l L, of which the external rays L a L l, are red; if the screen be moved to the other side of o, the luminous circle will be bordered with violet, because it will be a section of the cone M a M l, of which the exterior rays are violet.
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