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
... , it will be found that D and E are both in shadow , while the square C is illuminated . Remove the square C , and D will be lighted , which shows that all the light that falls on D previously fell THE SOURCES OF LIGHT . 333.
... , it will be found that D and E are both in shadow , while the square C is illuminated . Remove the square C , and D will be lighted , which shows that all the light that falls on D previously fell THE SOURCES OF LIGHT . 333.
Página 34
... falls on D previously fell on C. E yet remains in darkness . Next , remove D and replace C , and E still remains in shade ; but , on removing C , E is fully illuminated . This shows that the quantity of light that fell on C spreads over ...
... falls on D previously fell on C. E yet remains in darkness . Next , remove D and replace C , and E still remains in shade ; but , on removing C , E is fully illuminated . This shows that the quantity of light that fell on C spreads over ...
Página 39
... falls upon it . Now one edge of 、 B FIG . 8 . A the square is brightly lighted by the sunbeam , and if the mirror is placed at an angle of 45 degrees with the sunbeam , the other edge of the square is lighted up by the second beam . In ...
... falls upon it . Now one edge of 、 B FIG . 8 . A the square is brightly lighted by the sunbeam , and if the mirror is placed at an angle of 45 degrees with the sunbeam , the other edge of the square is lighted up by the second beam . In ...
Página 44
... fall into the darkened room . Bring a hand - mirror into this beam of light , and the beam of reflection will make a round spot of sun- light on the wall above the window . This spot of light is a picture of the sun thrown by the mirror ...
... fall into the darkened room . Bring a hand - mirror into this beam of light , and the beam of reflection will make a round spot of sun- light on the wall above the window . This spot of light is a picture of the sun thrown by the mirror ...
Página 49
... fall on the mirror . Hold the arm steady , and watch the spot of reflected light thrown upon the wall . See ! It moves backward and forward with a curious , jerking motion . It is like the ticking of a clock , or like the beating of ...
... fall on the mirror . Hold the arm steady , and watch the spot of reflected light thrown upon the wall . See ! It moves backward and forward with a curious , jerking motion . It is like the ticking of a clock , or like the beating 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