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 21
... hold the circular piece , G , and yet allow it to turn freely in every direction . A hole , 1 inch ( 32 millimetres ) in diameter , is cut through the triangular piece of wood K , as shown by the dotted lines , and then this block is ...
... hold the circular piece , G , and yet allow it to turn freely in every direction . A hole , 1 inch ( 32 millimetres ) in diameter , is cut through the triangular piece of wood K , as shown by the dotted lines , and then this block is ...
Página 31
... hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the table . The slit in the postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be horizontal . The card may ...
... hold the awl in place , the handle FIG . 5 . may be stuck in a mass of wax on the table . The slit in the postal - card should be 1 inch ( 25 mil- limetres ) long and inch ( 7 millimetres ) wide , and should be horizontal . The card may ...
Página 38
... Hold the mirror in the beam of light . At once you see there are two beams of sunlight , one from the heliostat and another from the mirror . Hold the glass toward the heliostat , and you will see this second beam going back toward the ...
... Hold the mirror in the beam of light . At once you see there are two beams of sunlight , one from the heliostat and another from the mirror . Hold the glass toward the heliostat , and you will see this second beam going back toward the ...
Página 43
... hold it upright between the two cards , with the bottom resting on the mirror . With a pencil make a mark on the edge of this at the point of in- cidence , marked by the awl , and at the hole in the card where the beam of incidence ...
... hold it upright between the two cards , with the bottom resting on the mirror . With a pencil make a mark on the edge of this at the point of in- cidence , marked by the awl , and at the hole in the card where the beam of incidence ...
Página 44
... Hold the mirror at an oblique angle in the sunbeam , and direct the beam of reflection upon the opposite wall . Now there are several re- flections , brilliant spots of light . If the spots 44 LIGHT . Experiment in Multiple Reflection.
... Hold the mirror at an oblique angle in the sunbeam , and direct the beam of reflection upon the opposite wall . Now there are several re- flections , brilliant spots of light . If the spots 44 LIGHT . Experiment in Multiple Reflection.
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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