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
... look , without or within , all the air and space about us 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 ...
... look , without or within , all the air and space about us 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 ...
Página 13
... look up into the sky and see thousands of them , fixed points of light , each a sun , but so far away that they seem mere spots and points of light . Besides these stars are others , called the planets , that move round the sun . These ...
... look up into the sky and see thousands of them , fixed points of light , each a sun , but so far away that they seem mere spots and points of light . Besides these stars are others , called the planets , that move round the sun . These ...
Página 26
... 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 . Plainly , if the thread is lighted up its whole length when it is straight , then the beam of light ...
... 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 . Plainly , if the thread is lighted up its whole length when it is straight , then the beam of light ...
Página 28
... Look at the lamp care- fully , and see that the flame is just on a level with the hole in the card . If it is too high or too low , place some books under it , or put the lamp on a pile of books on chair near the table . Take a chair ...
... Look at the lamp care- fully , and see that the flame is just on a level with the hole in the card . If it is too high or too low , place some books under it , or put the lamp on a pile of books on chair near the table . Take a chair ...
Página 32
... Look carefully at everything , and have the paper just on a level with the slit in the postal - card , and have the lamp , paper , and screen , just in line , and then the square shadow will appear sharp and clear on the white screen ...
... Look carefully at everything , and have the paper just on a level with the slit in the postal - card , and have the lamp , paper , and screen , just in line , and then the square shadow will appear sharp and clear on the white screen ...
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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