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 20
... straight 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 ...
... straight 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 ...
Página 24
... 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 . Here is a ...
... 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 . Here is a ...
Página 25
... straight and tight , so that it just touches the beam of light throughout its length . Were you to try this experiment , you would see 2 that the thread would suddenly be lighted up through- out. THE SOURCES OF LIGHT . 25.
... straight and tight , so that it just touches the beam of light throughout its length . Were you to try this experiment , you would see 2 that the thread would suddenly be lighted up through- out. THE SOURCES OF LIGHT . 25.
Página 26
... straight , then the beam of light must be straight also . Here we discover something about light ; we learn that it has a certain property . Our experiment shows that light moves in straight lines . EXPERIMENT WITH CARDS AND A LAMP ...
... straight , then the beam of light must be straight also . Here we discover something about light ; we learn that it has a certain property . Our experiment shows that light moves in straight lines . EXPERIMENT WITH CARDS AND A LAMP ...
Página 29
... straight , or we could not have seen it . The cards are in a straight line , and the beam of light must also be straight . This experiment , like the first , shows us that there is a law or rule governing the movement of light , and ...
... straight , or we could not have seen it . The cards are in a straight line , and the beam of light must also be straight . This experiment , like the first , shows us that there is a law or rule governing the movement of light , and ...
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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...