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A First Book of the Lens

  • Kartonierter Einband
  • 176 Seiten
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Excerpt from A First Book of the Lens: An Elementary Treatise on the Action and Use of the Photographic LensIn optics we are conc... Weiterlesen
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Excerpt from A First Book of the Lens: An Elementary Treatise on the Action and Use of the Photographic Lens

In optics we are concerned mainly with the effect of placing obstructions of various kinds in the way of the travelling energy and wavefront. A lens is nothing but a temporary obstruction placed in the way of the light, and the effect of such an obstruction is that the direction of the impulse is changed, and the form of the wavefront altered, just as the circular form of the water ripple is altered if it meets an obstruction in the pond. This is the point where the two theories of optics start.~ We may study only the effect of the obstruction on the wave front, which is physical optics or we may confine ourselves to the study of the effect of the obstruction on the direction of the impulse, which is geometrical optics. In either case we shall arrive at the same result, for under all conditions the direction of impulse is normal to the wave front, and so the two change together.

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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Produktinformationen

Titel: A First Book of the Lens
Untertitel: An Elementary Treatise on the Action and Use of the Photographic Lens (Classic Reprint)
Autor:
EAN: 9780282885731
ISBN: 0282885730
Format: Kartonierter Einband
Anzahl Seiten: 176
Gewicht: 245g
Größe: H229mm x B152mm x T9mm
Jahr: 2017

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