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Excerpt from An Elementary Treatise on Optics For a similar reason I have often omitted to notice parts of Figures which did not seem to me to require being mentioned, as my object was not to give de tailed descriptions from which Figures might be drawn. 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.
Excerpt from An Elementary Treatise on Geometrical Optics Suggestions which may improve and extend the use fulness of the book and notifications of errors will be very thankfully received by the author. 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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Excerpt from Thick-Lens Optics: An Elementary Treatise for the Student and the Amateur This volume is the outcome of an attempt to answer certain questions regarding the optics of the microscope and telescope; questions to which no thoroughly satisfactory answer could be found in any literature accessible to the author. Many answers were found, but they were discordant and unusable for practical work, mainly by reason of their complexity and seeming contradictoriness and lack of co-ordination. The following pages seek to answer these questions in a manner so plain and simple that the average amateur can find out for himself what is going on optically in his camera, microscope, or telescope. To this end the mathematics is of the simplest kind, so that the busy man who has forgotten all or most of his mathematics can nevertheless work his way through, provided he can use the simplest kind of algebra, two theorems in elementary geometry and one in trigonometry. For the reader who has not had trigonometry, the few simple principles required are given in the text. So far as mathematical difficulties go, any high-school student is sufficiently equipped. As an aid to concreteness and clearness the investigations are based upon graphic principles as much as possible and along intuitive lines. 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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Excerpt from A Short Elementary Treatise on Experimental and Mathematical Optics In the present instance, the author's object is to facili tate the tudy of Elementary Optics, with immediate refer ence to the wants of the student, circumstanced as he at present is in the University of Oxford. To this particular case none of the existing treatises appear completely adapted; and though such is the discouragement under which physical studies labour in this place, that the mere character of the treatises produced on these branches, can, perhaps, very little affect their actual progress; yet that no obstacle may remain which is capable of being removed, he considers it worth while to try to remedy the complaints against existing works, whether as too large and too difficult on the one hand, or as incomplete and obscure on the other. 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.
Excerpt from Elementary Treatise on Optics: Containing All the Requisite Propositions Carried to First Approximations; With the Construction of Optical Instruments, for the Use of Junior University Students In the present First Part of Geometrical Optics, the theory of optical instruments will be discussed, by taking the propositions to first approximations only; and in the Second Part the proposi tions will be discussed to second approximations, and the more corrected forms of some of the instruments treated of. This method involves the advantages of a more elementary treatise in the First Part, and a higher one in combining the two Parts. 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.
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. 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.