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
... N you will see these two pieces fastened together . Fig . I is the most difficult piece of all . It should be made of ash or some hard wood . One end is square , and has a deep slot cut in it ; the rest is round 20 LIGHT .
... N you will see these two pieces fastened together . Fig . I is the most difficult piece of all . It should be made of ash or some hard wood . One end is square , and has a deep slot cut in it ; the rest is round 20 LIGHT .
Página 21
... square . This makes all the movable parts of the heliostat , and , when we have put in the mirrors , the instrument is finished and ready for use . We must have two mirrors , one 6 inches ( 15.2 centimetres ) square and one 10 inches ...
... square . This makes all the movable parts of the heliostat , and , when we have put in the mirrors , the instrument is finished and ready for use . We must have two mirrors , one 6 inches ( 15.2 centimetres ) square and one 10 inches ...
Página 24
... square , and lay a five - cent piece in the centre , and , with a knife , cut a hole in the card just the size of the coin . Then fasten this , with pins or tacks , over the opening in the heliostat . We have now a slender beam of light ...
... square , and lay a five - cent piece in the centre , and , with a knife , cut a hole in the card just the size of the coin . Then fasten this , with pins or tacks , over the opening in the heliostat . We have now a slender beam of light ...
Página 30
... square paper , fastened to the end of our needle - pointed awl , and beside this is a lamp , and next to the lamp is a 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 ...
... square paper , fastened to the end of our needle - pointed awl , and beside this is a lamp , and next to the lamp is a 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 ...
Página 31
... square ; and to hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the table . The slit in the postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be ...
... square ; and to hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the table . The slit in the postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be ...
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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...