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 |
Dentro del libro
Resultados 1-5 de 23
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 ...
Otras ediciones - Ver todas
Términos y frases comunes
17.8 centimetres angle of incidence Animals appear beam of light beam of reflection beam of sunlight beautiful black mirror block of wood blue BOND STREET bright candle centi centre CHARLES BARNARD circle cloth color color-top critical angle curious dark room diagram diameter direction disk distance dotted lines experiment falls fastened flask focus give glass gray paper heliostat hold hole Illustrations inch 25 millimetres inches 15.2 centimetres index of refraction lamp lantern light entering light passes look looking-glass magic lanterns metres mirror mucilage phenomena picture piece plano-convex lens point of incidence postal-card rays red square reflected light refraction represents ring screen shade shadow sheet shelf shine side slender beam slide slip slit smoke spot of light square stars straight surface things top spin tube wall water-lens wide window yellow
Pasajes populares
Página 3 - ... recommendation of this handy volume. The illustrations add to its interest and value, and its simplicity, both of design and execution, will commend it to beginners and others seeking information on the subject." From the Philadelphia Press. "It supplies a large number of simple and entertaining experiments on the phenomena of light, that any one can perform with materials that maybe found in any dwelling-house, or that maybe bought for a small sum in any town or city. This actually is philosophy...