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 27
... postal - cards , and lay them flat on a board , one over the other . Just here we need a tool for making small holes and doing other work in these experiments ; and we push , with a ... postal - card , and with the. THE SOURCES OF LIGHT . 27.
... postal - cards , and lay them flat on a board , one over the other . Just here we need a tool for making small holes and doing other work in these experiments ; and we push , with a ... postal - card , and with the. THE SOURCES OF LIGHT . 27.
Página 28
... postal - card , and with the awl punch a hole through them all , just half - way from each side . Lift the cards up , and with a sharp penknife pare off the rough edges of the holes , and then run the needle through each , so as to make ...
... postal - card , and with the awl punch a hole through them all , just half - way from each side . Lift the cards up , and with a sharp penknife pare off the rough edges of the holes , and then run the needle through each , so as to make ...
Página 30
... postal - card , having a slit cut in it near the top . On the screen you will no- tice that there is a shadow of the bit of paper held on the needle . The paper screen may be made of any sheet of white paper , and it may be 30 LIGHT ...
... postal - card , having a slit cut in it near the top . On the screen you will no- tice that there is a shadow of the bit of paper held on the needle . The paper screen may be made of any sheet of white paper , and it may be 30 LIGHT ...
Página 31
... postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be horizontal . The card may rest against the lamp , and , if it is not high enough , put something under it , so that the slit will ...
... postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be horizontal . The card may rest against the lamp , and , if it is not high enough , put something under it , so that the slit will ...
Página 32
... 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 . With a lead - pencil trace an outline of this shadow on the screen ; then move 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 . With a lead - pencil trace an outline of this shadow on the screen ; then move the ...
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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...