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 12
... appears to be full of light . When evening comes again , the daylight disappears , and the moon and the stars give us another light . In the house we start the lamps , and they give us another light . Out - of- doors , in the dusky ...
... appears to be full of light . When evening comes again , the daylight disappears , and the moon and the stars give us another light . In the house we start the lamps , and they give us another light . Out - of- doors , in the dusky ...
Página 13
... appear like flakes and clouds of light in the sky , and the comets appear only at rare intervals , as wandering stars that shine for a little while in the sky and then disappear . The stars are scattered widely apart through the vast ...
... appear like flakes and clouds of light in the sky , and the comets appear only at rare intervals , as wandering stars that shine for a little while in the sky and then disappear . The stars are scattered widely apart through the vast ...
Página 26
... appear and disappear as if by magic . This is a very pretty experiment ; but we must not stop to look at its merely curious effects . Try it over several times , and see if it does not show you something about the beam of sunlight ...
... appear and disappear as if by magic . This is a very pretty experiment ; but we must not stop to look at its merely curious effects . Try it over several times , and see if it does not show you something about the beam of sunlight ...
Página 32
... appear sharp and clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then move the screen just 12 inches ( 30.5 centimetres ) farther from the lamp . Look at the shadow . See how it has ...
... appear sharp and clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then move the screen just 12 inches ( 30.5 centimetres ) farther from the lamp . Look at the shadow . See how it has ...
Página 36
... appears of a uniform depth . Now both lamp and candle cast just as deep a shadow , and yet one is much farther from the screen than the other . Measure off the distance . Perhaps the candle is 22 inches ( 55.8 centimetres ) from the the ...
... appears of a uniform depth . Now both lamp and candle cast just as deep a shadow , and yet one is much farther from the screen than the other . Measure off the distance . Perhaps the candle is 22 inches ( 55.8 centimetres ) from the the ...
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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