Light: A Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Light, for the Use of Students of Every AgeD. Appleton, 1877 - 112 páginas |
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Página 16
... enter , the light fills every- thing , and is all about us on every side . Now , in studying light we do not wish a great quantity . We want only a slender beam , and we must bring it into a dark room , where we can see it and walk ...
... enter , the light fills every- thing , and is all about us on every side . Now , in studying light we do not wish a great quantity . We want only a slender beam , and we must bring it into a dark room , where we can see it and walk ...
Página 24
... enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To do this , shawls or blankets or enameled cloth will be found useful inside the curtains and shutters . Then get a piece of ...
... enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To do this , shawls or blankets or enameled cloth will be found useful inside the curtains and shutters . Then get a piece of ...
Página 25
... enters the room . A boy is holding one end of a long piece of linen thread just at the bottom of the hole in the FIG . 3 . card , and another boy has drawn the thread out straight and tight , so that it just touches the beam of light ...
... enters the room . A boy is holding one end of a long piece of linen thread just at the bottom of the hole in the FIG . 3 . card , and another boy has drawn the thread out straight and tight , so that it just touches the beam of light ...
Página 38
... enters the room , strikes the mirror , and then we appear to have another . It is the same beam , thrown back from the glass . This turning back of a beam of light we call the reflection of light . Place a table opposite the heliostat ...
... enters the room , strikes the mirror , and then we appear to have another . It is the same beam , thrown back from the glass . This turning back of a beam of light we call the reflection of light . Place a table opposite the heliostat ...
Página 43
... enters , and marked A in the drawing . Draw a line between these two points and you have an angle formed by this line and the base of the paper . This angle marks the angle of incidence . Put the paper on the blocks , with the ruled ...
... enters , and marked A in the drawing . Draw a line between these two points and you have an angle formed by this line and the base of the paper . This angle marks the angle of incidence . Put the paper on the blocks , with the ruled ...
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Términos y frases comunes
15.2 centimetres 551 BROADWAY ALEXANDER BAIN ALFRED MARSHALL angle angle of incidence appear beam of light beam of reflection beam of sunlight beautiful black mirror block of wood blue bright candle centi centre CHARLES BARNARD color color-top curious dark room diameter disk distance dotted lines experiment fastened flask focus FRANCIS GALTON give glass gray paper green heliostat hole Illustrations inch 25 millimetres inches 12.7 centimetres lamp lantern light entering light passes look looking-glass M. A. Cloth magic lanterns ments metres mirror mucilage phenomena picture piece plano-convex lens point of incidence postal-card Price Prof Professor rays red square reflected light refraction ring SCIENCE screen shade shadow sheet shine side slide slit smoke spot of light square stars surface things top spin tube University of Erlangen violet wall water-lens window yellow