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 16
... 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 several beams , make it pass ...
... 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 several beams , make it pass ...
Página 17
... beam of light will stand out clear , sharp , and bright . As soon as we begin to study this beam of light , we find two little matters that may give us trouble . The sun does not stand still in the sky , and our beam of light keeps ...
... beam of light will stand out clear , sharp , and bright . As soon as we begin to study this beam of light , we find two little matters that may give us trouble . The sun does not stand still in the sky , and our beam of light keeps ...
Página 24
... beam of light into the small mirror . Then turn the handle to the right or left , and a round , horizontal beam of light will enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To ...
... beam of light into the small mirror . Then turn the handle to the right or left , and a round , horizontal beam of light will enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To ...
Página 25
... light enters the room . A boy is holding one end of a long piece of linen thread just at the bottom of the hole in the FIG . 3 . card , and another boy has drawn the thread out straight and tight , so that it just touches the beam of light ...
... light enters the room . A boy is holding one end of a long piece of linen thread just at the bottom of the hole in the FIG . 3 . card , and another boy has drawn the thread out straight and tight , so that it just touches the beam of light ...
Página 26
... 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 . Here is a picture ...
... 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 . Here is a picture ...
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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...