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 34
... shade ; but , on removing C , E is fully illuminated . This shows that the quantity of light that fell on C spreads over four times the surface at the distance D , and nine times the surface at the distance E. Hence each one of the ...
... shade ; but , on removing C , E is fully illuminated . This shows that the quantity of light that fell on C spreads over four times the surface at the distance D , and nine times the surface at the distance E. Hence each one of the ...
Página 71
... open , and at the top is a round hole , 5 inches ( 12.7 centimetres ) in diameter . On this opening rests a hemispherical glass dish , made by cutting off the round top of a glass shade . This. REFRACTION OF LIGHT . . 71 The Water-Lens.
... open , and at the top is a round hole , 5 inches ( 12.7 centimetres ) in diameter . On this opening rests a hemispherical glass dish , made by cutting off the round top of a glass shade . This. REFRACTION OF LIGHT . . 71 The Water-Lens.
Página 72
... shade . This makes a thin glass bowl , 5 inches ( 14 centimetres ) in diam- eter , and it rests in the hole , partly above and partly below the top of the box . Inside the box two strips of wood are fastened , one on each side , at an ...
... shade . This makes a thin glass bowl , 5 inches ( 14 centimetres ) in diam- eter , and it rests in the hole , partly above and partly below the top of the box . Inside the box two strips of wood are fastened , one on each side , at an ...
Página 96
... shades , and no others , and then cut out three narrow strips of cardboard , and give one a coat of the red , one a coat of violet , and paint the other green . give them a good thick coat , so as to hide the white paper . Study the ...
... shades , and no others , and then cut out three narrow strips of cardboard , and give one a coat of the red , one a coat of violet , and paint the other green . give them a good thick coat , so as to hide the white paper . Study the ...
Página 97
... shades of yellow , from deep - orange to yellowish - green , and between the green and the violet are many shades of blue , from greenish - blue to deep indi- go . It is thought that , when we see a red light , cer- tain nerves in the ...
... shades of yellow , from deep - orange to yellowish - green , and between the green and the violet are many shades of blue , from greenish - blue to deep indi- go . It is thought that , when we see a red light , cer- tain nerves in 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...