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
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Página 16
... enter , the light fills every- thing , and is all about us on every side . Now , in studying 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 ...
... enter , the light fills every- thing , and is all about us on every side . Now , in studying 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 ...
Página 24
... enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To do this , shawls or blankets or enameled cloth will be found useful inside the curtains and shutters . Then get a piece of ...
... enter the room . When this is done , close all the windows , so as to make the room as dark as possible . To do this , shawls or blankets or enameled cloth will be found useful inside the curtains and shutters . Then get a piece of ...
Página 25
... 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 ...
... 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 38
... enters the room , strikes the mirror , and then we appear to have another . It is the same beam , thrown back from the glass . This turning back of a beam of light we call the reflection of light . Place a table opposite the heliostat ...
... enters the room , strikes the mirror , and then we appear to have another . It is the same beam , thrown back from the glass . This turning back of a beam of light we call the reflection of light . Place a table opposite the heliostat ...
Página 43
... enters , and marked A in the drawing . Draw a line between these two points and you have an angle formed by this line and the base of the paper . This angle marks the angle of incidence . Put the paper on the blocks , with the ruled ...
... enters , and marked A in the drawing . Draw a line between these two points and you have an angle formed by this line and the base of the paper . This angle marks the angle of incidence . Put the paper on the blocks , with the ruled ...
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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...