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State Board Examinations

• C. Henry Brown
• Kartonierter Einband
• 362 Seiten
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Excerpt from State Board Examinations: Questions and Answers A coin one inch in diameter is held twelve inches from a lens which ... Weiterlesen
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Excerpt from State Board Examinations: Questions and Answers A coin one inch in diameter is held twelve inches from a lens which has a principal focus of four inches. Where will the image be formed and what will be its size? Show the calculation. Parallel rays of light passing through this lens would be brought to focus at a distance of four inches. If the coin was placed at twelve inches the rays would be divergent and would reduce the power of the lens and throw the focus farther away. As these inch numbers must be expressed in fractions, the problem would be worked out by the usual formula, which in this case would be 1/4 - 1/12 = 1/6. So that the point where the image would be six inches from the lens and on the opposite side from the object. Since the object is at a distance of twelve inches from the lens and the image at a distance of six inches from it, which is just one-half the distance, the size would be one-half the size of the object, or one-half inch. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com 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.

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 Titel: State Board Examinations Untertitel: Questions and Answers (Classic Reprint) Autor: C. Henry Brown EAN: 9781332322336 ISBN: 1332322336 Format: Kartonierter Einband Anzahl Seiten: 362 Gewicht: 485g Größe: H229mm x B152mm x T19mm Jahr: 2015