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
... paper . Cut a hole in this paper about the size of a five - cent piece , and at once you will have a slender beam of sunlight entering the hole in the paper and falling on the floor . Close the upper part of the window 16 LIGHT . The ...
... paper . Cut a hole in this paper about the size of a five - cent piece , and at once you will have a slender beam of sunlight entering the hole in the paper and falling on the floor . Close the upper part of the window 16 LIGHT . The ...
Página 30
... paper , standing upright , like a small screen , upon a table . Near it is a bit of square paper , fastened to the end of our needle - pointed awl , and beside this is a lamp , and next to the lamp is a postal - card , having a slit cut ...
... paper , standing upright , like a small screen , upon a table . Near it is a bit of square paper , fastened to the end of our needle - pointed awl , and beside this is a lamp , and next to the lamp is a postal - card , having a slit cut ...
Página 31
... paper , and it may be held up- right by placing some books behind it . The bit of paper on the needle is just 1 inch ( 25 millimetres ) square ; and to hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the ...
... paper , and it may be held up- right by placing some books behind it . The bit of paper on the needle is just 1 inch ( 25 millimetres ) square ; and to hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the ...
Página 32
... paper square and the lamp , and about 24 inches ( 61 centimetres ) from the lamp . If everything is right , there will be a square shadow of the bit of paper on the screen . Look carefully at everything , and have the paper just on a ...
... paper square and the lamp , and about 24 inches ( 61 centimetres ) from the lamp . If everything is right , there will be a square shadow of the bit of paper on the screen . Look carefully at everything , and have the paper just on a ...
Página 33
... paper C on the tracing of the small shadow D , you will observe that it only covers one- fourth of the surface , and that the shadow is four times as large . Place it on the larger shadow E , and you will see that it covers only one ...
... paper C on the tracing of the small shadow D , you will observe that it only covers one- fourth of the surface , and that the shadow is four times as large . Place it on the larger shadow E , and you will see that it covers only one ...
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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