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 76
... focus , and then all pass each other and go on in their previous direc- tions ; and you can readily see that a new cone of light will be formed , upside down , above the focus ; and beyond it all the rays will spread out wider and wider ...
... focus , and then all pass each other and go on in their previous direc- tions ; and you can readily see that a new cone of light will be formed , upside down , above the focus ; and beyond it all the rays will spread out wider and wider ...
Página 78
... focus . This focus consists of points , each of which is formed by the conver- gence of rays which come from a similar point in the window . This we call a projection , because the light is projected or thrown upon the wall by the lens ...
... focus . This focus consists of points , each of which is formed by the conver- gence of rays which come from a similar point in the window . This we call a projection , because the light is projected or thrown upon the wall by the lens ...
Página 79
... focus . Those from the top of the window are refracted in one direction , those from the bottom in another , and thus they cross each other , and the projected image of the window appears to be upside down . The picture on page 77 in ...
... focus . Those from the top of the window are refracted in one direction , those from the bottom in another , and thus they cross each other , and the projected image of the window appears to be upside down . The picture on page 77 in ...
Página 82
... focus as in our other experiments , except that here the cone is entirely under water . Study this singular cone carefully , and adjust the flask so that the point of the cone shines on the finger at the hole in the side . When this is ...
... focus as in our other experiments , except that here the cone is entirely under water . Study this singular cone carefully , and adjust the flask so that the point of the cone shines on the finger at the hole in the side . When this is ...
Página 87
... focus . It is again refracted in the small glass of water , and is reflected by the mirror on the screen . Get a piece of smoked glass , and trace upon it some letters , and then lay it on the water - lens with the top ( upper side of ...
... focus . It is again refracted in the small glass of water , and is reflected by the mirror on the screen . Get a piece of smoked glass , and trace upon it some letters , and then lay it on the water - lens with the top ( upper side of ...
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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