This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...diverging from either point will converge to the other. In Fig. 136, the rays BA and BD diverge from B as the radiant point; after reflection they diverge from B' behind the reflecting surface, and B' is a virtual focus. B and B' are again conjugate foci. In the first case the source of light is farther from the mirror ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...diverging from either point will converge to the other. In Fig. 136, the rays BA and BD diverge from B as the radiant point; after reflection they diverge from B' behind the reflecting surface, and B' is a virtual focus. B and B' are again conjugate foci. In the first case the source of light is farther from the mirror than the centre of curvature, and the focus is real; in the second case it is nearer the mirror than the principal focus, and the focus is virtual.1 Fig. 136. 253. Formation of Images.--Experiment.--Darken the room and support on the table a spherical mirror, a lamp, and a small screen. The lamp and screen must be placed so that the screen will not cut off too much light from the mirror. Place the lamp anywhere beyond the focus, and move the screen till a clear image of the flame is formed on it. Notice the size and position of the image, and whether it is erect or inverted. When the lamp is between the focus and the mirror, an image of it cannot be obtained on the screen, but it can be seen by looking into the mirror. The same is true for the convex mirror, whatever be the position of the lamp; in these last cases the image is a virtual one. The experiment illustrates the several relative positions of the object and its image for a concave mirror, all depending on the position of the object with respect to the mirror: --First.--When the object is at a finite distance beyond the centre of curvature, the image is real, inverted, smaller than the object, and between the centre of curvature and the focus (Fig. 137). When the mirror is convex, the image is always virtual, erect, and smaller than the object (Fig. 139). 254. Construction for Images.--The geometrical construction for images in spherical mirrors consists in finding conjugate focal poi..
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Seller's Description:
Fair. No Jacket. 8vo-7¾"-9¾" Tall. Blue cloth boards are very mottled, scuffed and rubbed. Prior owner name on feb. Pages lightly tanning, text has no markings, binding sound.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
