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 27
... wooden penholder , or other slender stick , putting the eye - end into the wood , and thus making a needle- pointed awl . Measure off one - half inch from one end of the top postal - card , and with the. THE SOURCES OF LIGHT . 27.
... wooden penholder , or other slender stick , putting the eye - end into the wood , and thus making a needle- pointed awl . Measure off one - half inch from one end of the top postal - card , and with the. THE SOURCES OF LIGHT . 27.
Página 28
... wooden slips , and put the card squarely on one of the wooden blocks and place the slip over it , and tack them both down to the block . This will give us the cards and the picture . When each card is blocks as shown in thus fastened to ...
... wooden slips , and put the card squarely on one of the wooden blocks and place the slip over it , and tack them both down to the block . This will give us the cards and the picture . When each card is blocks as shown in thus fastened to ...
Página 35
... wood or bit of wax . ) A lighted candle is placed on the table , about 22 inches ( 55.8 centimetres ) from the screen . Beyond this is a lamp , placed upon a pile of books , so as to bring the FIG . 7 . flame of the lamp on a level with ...
... wood or bit of wax . ) A lighted candle is placed on the table , about 22 inches ( 55.8 centimetres ) from the screen . Beyond this is a lamp , placed upon a pile of books , so as to bring the FIG . 7 . flame of the lamp on a level with ...
Página 41
... of 45 . Move the mirror to an angle of 674 , and the beam of reflection will move round to an angle of 135 degrees . This drawing represents the two postal - cards fitted on blocks of wood that we used in a former. REFLECTION OF LIGHT . 41.
... of 45 . Move the mirror to an angle of 674 , and the beam of reflection will move round to an angle of 135 degrees . This drawing represents the two postal - cards fitted on blocks of wood that we used in a former. REFLECTION OF LIGHT . 41.
Página 42
... wood that we used in a former experi- ment , and the three blocks of wood we cut out at that time . The five blocks are placed close together in a line , and with the postal - cards at the ends . A lighted lamp is placed near one of the ...
... wood that we used in a former experi- ment , and the three blocks of wood we cut out at that time . The five blocks are placed close together in a line , and with the postal - cards at the ends . A lighted lamp is placed near one of the ...
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Términos y frases comunes
15.2 centimetres 551 BROADWAY ALEXANDER BAIN ALFRED MARSHALL angle angle of incidence appear beam of light beam of reflection beam of sunlight beautiful black mirror block of wood blue bright candle centi centre CHARLES BARNARD color color-top curious dark room diameter disk distance dotted lines experiment fastened flask focus FRANCIS GALTON give glass gray paper green heliostat hole Illustrations inch 25 millimetres inches 12.7 centimetres lamp lantern light entering light passes look looking-glass M. A. Cloth magic lanterns ments metres mirror mucilage phenomena picture piece plano-convex lens point of incidence postal-card Price Prof Professor rays red square reflected light refraction ring SCIENCE screen shade shadow sheet shine side slide slit smoke spot of light square stars surface things top spin tube University of Erlangen violet wall water-lens window yellow