Sinopsis
Many of the earliest books, particularly those dating back to 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original artwork and text.
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Reseña del editor
Many of the earliest books, particularly those dating back to 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original artwork and text.
Reseña del editor
LECTURE NOTES ON LIGHT - I9I7 - PREFACE - THIS book marks in some ways a new departure and differs in certain important respects from the usual type of School Science Manual. It is not a text-book in the ordinary sense of the term, but, as the title indicates, a collection of lecture notes. The book is based on the belief that the study of Physics should be conducted by means of experimental lectures, combined with practical work in the laboratory, and that 7 the lectures should be summarised in the form of notes. Anyone who sets out to learn any branch of Physics, merely with the aid of a text-book, is likely to discover that he has undertaken an impossible task. To get a real and thorough grasp of his subject some form of notes is absolutely indispensable, and it is of the first importance that these notes should be correctly drawn up and well arranged. It is with the idea of supplying this need athat these notes have been compiled, and no pains have been spared to make them as complete as possible. If the importance of having good notes is once accepted, the question then arises as to the form that they should take. Should they be written or printed notes For a good many years notes on Physics were dictated to the boys at Greshams School It was found, however, that this took up a considerable amount of valuable time, which could be saved by having the notes printed and copies supplied to the boys. The result has been a gain of fifty per cent. in the amount of ground covered. At the same time it has been found that the subject matter has been acquired by the boys just as well as through the dictated notes, perhaps even better. In the study of Light the drawing of diagrams forms a by no means inconsiderable portion of the work and training. A special feature of the book will be found to be the space provided for this purpose. I t will be noticed that the left-hand pages have been kept entirely blank so as to enable boys to insert their own diagrams. The present volume is a reprint, with certain corrections and modifications, of the original one. An edition, however, is also being published complete with diagrams. This is designed to serve mainly as a key, for the use of Masters, to the diagrams referred to in the text it is hoped that it may also be found useful for boys who are compelled to work rapidly through the subject, and have not sufficient time to draw the diagrams for themselves. The book is intended to supplement, but not to replace, lectures, and it is meant to be used in the following manner. The Master lectures on the lines of the notes and draws the diagrams on the board. The boys enter the diagrams in their books, either during the hour or in preparation, whichever is found to be the more convenient. In order to draw attention to certain laws, statements etc., which it is important to learn precisely, the author has adopted the plan of putting the letters Def., implying Definition, before those portions of the notes which, in his opinion, ought to be learnt by heart. I t would be impossible to let the book go to print without a word of grateful thanks to the many Gresham boys whose keenness and enthusiasm have made the compilation of these notes such a pleasure to the author...
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