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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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