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 17
... clear , sharp , and bright . As soon as we begin to study this beam of light , we find two little matters that may give us trouble . The sun does not stand still in the sky , and our beam of light keeps moving . Besides this , the beam ...
... clear , sharp , and bright . As soon as we begin to study this beam of light , we find two little matters that may give us trouble . The sun does not stand still in the sky , and our beam of light keeps moving . Besides this , the beam ...
Página 32
... clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then move the screen just 12 inches ( 30.5 centimetres ) farther from the lamp . Look at the shadow . See how it has increased in size ...
... clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then move the screen just 12 inches ( 30.5 centimetres ) farther from the lamp . Look at the shadow . See how it has increased in size ...
Página 45
... clear , turn the mirror slowly round and you will soon find a position for the glass that will give six or more reflections . How does it happen that a common looking - glass can thus split a single sunbeam into several beams ? If you ...
... clear , turn the mirror slowly round and you will soon find a position for the glass that will give six or more reflections . How does it happen that a common looking - glass can thus split a single sunbeam into several beams ? If you ...
Página 51
... clear . Turn back the coat - sleeve so as to expose part of the white cuff , and then bring the velvet into the beam of sunlight . You will observe nothing in particular , for the black , REFLECTION OF LIGHT . 51 Experiments in ...
... clear . Turn back the coat - sleeve so as to expose part of the white cuff , and then bring the velvet into the beam of sunlight . You will observe nothing in particular , for the black , REFLECTION OF LIGHT . 51 Experiments in ...
Página 53
... clear and distinct reflec- tion of the lamp and the flame pictured on the glass . Put a sheet of white paper before the lamp , and you can see only a confused spot of reflected light on the brightly - lighted paper . Lay a freshly ...
... clear and distinct reflec- tion of the lamp and the flame pictured on the glass . Put a sheet of white paper before the lamp , and you can see only a confused spot of reflected light on the brightly - lighted paper . Lay a freshly ...
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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...