Light: A Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Light, for the Use of Students of Every AgeAppleton, 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
24 inches angle of incidence appear Balfour Stewart beam of incidence beam of light beam of reflection beam of sunlight bit of paper black mirror black varnish block of wood bottle brackets bright candle centi centre cloth color color-top curious dark room diagram diameter direction disk distance dotted lines experiment falls fastened flask give green heliostat hole inch 12 inch 25 millimetres inches 10 centimetres inches 15.2 centimetres inches 30.5 centimetres lamp lantern lens light enters light moves light passes look looking-glass magic lanterns marked metres mirror mucilage piece plano-convex lens point of incidence postal-card quicksilver rays red square reflected light refraction screen second drawing shade shadow shelf shining side slender beam slit smoke source of light spectrum spot of light square surface things top spin violet wall water-lens wide window yellow