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 13
... side of the atmosphere we call celestial light , and the sources of this light are stars , comets , and nebulæ . The nebulæ appear like flakes and clouds of light in the sky , and the comets appear only at rare intervals , as wandering ...
... side of the atmosphere we call celestial light , and the sources of this light are stars , comets , and nebulæ . The nebulæ appear like flakes and clouds of light in the sky , and the comets appear only at rare intervals , as wandering ...
Página 16
... 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 about it and examine it on every side , bend it , split it up into ...
... 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 about it and examine it on every side , bend it , split it up into ...
Página 19
... side of the board screw two iron brackets , using brackets measuring 14 inches ( 35.5 centimetres ) by 12 inches ( 30.5 centimetres ) . These brackets are placed one on each side of the hole in the board , and are placed 14 inches ...
... side of the board screw two iron brackets , using brackets measuring 14 inches ( 35.5 centimetres ) by 12 inches ( 30.5 centimetres ) . These brackets are placed one on each side of the hole in the board , and are placed 14 inches ...
Página 20
... side , and with the circular part with a radius of 3 inches ( 7.6 centimetres ) . A hole , inch ( 12 millimetres ) in diameter , is made in this , as represented in the drawing , and then the half- round piece must be screwed to the ...
... side , and with the circular part with a radius of 3 inches ( 7.6 centimetres ) . A hole , inch ( 12 millimetres ) in diameter , is made in this , as represented in the drawing , and then the half- round piece must be screwed to the ...
Página 24
... sides . See how straight this slender bar of light is ; it bends to neither the left nor right , but extends across the room in an absolutely straight line . As the sun moves , turn the handle of the heliostat to keep the light in place ...
... sides . See how straight this slender bar of light is ; it bends to neither the left nor right , but extends across the room in an absolutely straight line . As the sun moves , turn the handle of the heliostat to keep the light in place ...
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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