Light And Electricity - Notes Of Two Courses Of Lectures Before The Royal Institution Of Great Britain - Tapa blanda

Tyndall, John

9781408617090: Light And Electricity - Notes Of Two Courses Of Lectures Before The Royal Institution Of Great Britain

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ISBN 10: 1408617099 ISBN 13: 9781408617090

Editorial: Read Books, 2008

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LIGHT AND ELECTXICITY - 1871 - PREFACE TO THE AMERICAN EDITION - FOR the benefit of those who attended his lectures on Light and Electricity at the Royal Institution, Prof. Tyndall prepared with much care a series of Notes, sum ming up briefly and clearly the leading facts and principles of these sciences. The Notes proved so serviceable to those for whom they were designed, that they mere widely sought by students and teachers, and Prof. Tyndall accordingly had them reprinted in two small books. Under the conviction that they mill be equally appreciated by instructors and . learners in this country, they are here combined and republished in a single volume. No intelligent teacher or earnest student needs to be reminded of the importance of repetition and recapitulation to give permanence to mental impressions. But it is neither possible nor desirable to retain in the memory the copious details which may be necessary to the first comprehension of a subject. Hence, after listening to a course of lectures, or going through an extended work in which facts, experimental proofs, and speculations, have been elaborately presented, it is invaluable to retrnvcrse the field, concentrating attention upon the prornincnt and established principles of the subject. This is an in dispensable condition of a11 solid acquisition and, in thus clearly and sharply stating the fundamental principles of Electrical and Optical Science, Prof. Tyndall has earned the cordial thanks of all interested in education. - CONTENTS - X I G I I T PAGE General Considerations. Rectilinear Propagation of Light . . 11 Formation of Imagcs through Small Apertures . 12 Shadows 13 Enfeeblement of Light by Distance Law of Inverse Squares . 15 Photometry, or the Measurement of Light . 16 Brightness 1 7 Light requires Time to pass through Space . . 19 L Aberration of Light 20 Eeflection of Light Catoptrics-Plane Xirrors . 22 Verification of the Gaw of Reflection . 22 Reflection from Curved Surfaces Concave Mirrors . . 27 Caustics by Reflection Catacaustics . . 31 Convex Mirrors . 32 Refraction of Light Dioptrics . 33 Opacity of Transparent Nixtures 39 Total Reflection 41 Lenses 44 Convergik Lenses . 44 Diverging Lenses . 44 Vision and the Eye 46 Adjustment of the Eye Use of Spectacles . . 48 The Punctum Coecum . . 50 Persistence of Impressions . . 61 Bodies seen within the Eye 62 The Stereoscope . . 64 Nature of Light Physical Theory of Reflection and Refraction 69 Theory of Emission . . . 67 Theory of Undulation . . . 59 Prisms . 64 Prismatic Analysis of Light Dispersion . . . 65 Invisible Rays Calosescence and Fluorescence . 66 Doctrine of Visual Periods . . . . 68 Doctrine of Colors . . 69 Chromatic Aberration. Achromatism . 5 1 Subjective Colors . . . 5 2 Spectrum Analysis . . . . 5 4 Further Definition of Radiation and Absorption , L 5 5 The pure Spectrum Fraunhofers Lines . . . 5 7 Reciprocity of Radiation and Absorption 5 8 Solar Chemistry . . 80 Planetary Chemistry . S1 Stellar Chemistry . . . . 82 Nebular Chemistry . 83 The Red Prominences and Envelope of the Sun . 83 The Rainbow . . . 84 Interference of Light . . . 86 Diffraction, or the Inflection of Light . 88 Xeasurement of the Waves of Light . L . 93 Colors of Thin Plates . . . . . 96 Double Rcfraction . . . 101 Phenomena presented by 1heland Spar . . . . 104 Polarization of Light . . . . 106 Polurization of Light by Reflection . . . . 108 Polarization of Light by Refraction ...

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