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 33
... rays of light spread out wider and wider the farther they travel from the source of light . Now , make two squares of paper , one the size of D and the other the size of E. Then place D B 12 " FIG . 6 . D 24 " 36 " 24 inches ( 61 ...
... rays of light spread out wider and wider the farther they travel from the source of light . Now , make two squares of paper , one the size of D and the other the size of E. Then place D B 12 " FIG . 6 . D 24 " 36 " 24 inches ( 61 ...
Página 51
... rays of light take , and shows how each is reflected from side to side till they all meet in the eye . The dotted lines and the rings projected beyond the tube show how they appear to the eye . By studying this drawing carefully , and ...
... rays of light take , and shows how each is reflected from side to side till they all meet in the eye . The dotted lines and the rings projected beyond the tube show how they appear to the eye . By studying this drawing carefully , and ...
Página 53
... rays . They are scattered about , and the image they form is confused and indistinct . In the third draw- ing we have a rough surface , like cloth , and here the rays of the beam of reflection are scattered in every direction , and we ...
... rays . They are scattered about , and the image they form is confused and indistinct . In the third draw- ing we have a rough surface , like cloth , and here the rays of the beam of reflection are scattered in every direction , and we ...
Página 76
... ray is represented as meeting at the 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 ...
... ray is represented as meeting at the 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 ...
Página 78
... 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 . To understand this we must notice that every part of the window sends light into the ...
... 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 . To understand this we must notice that every part of the window sends light into 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