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 30
... slit cut in it near the top . On the screen you will no- tice that there is a shadow of the bit of paper held on the needle . The paper screen may be made of any sheet of white paper , and it may be 30 LIGHT . Experiment with Shadows.
... slit cut in it near the top . On the screen you will no- tice that there is a shadow of the bit of paper held on the needle . The paper screen may be made of any sheet of white paper , and it may be 30 LIGHT . Experiment with Shadows.
Página 31
... 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 rest against the lamp , and , if it is not high enough , put something under it , so that 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 rest against the lamp , and , if it is not high enough , put something under it , so that the ...
Página 32
... slit in the postal - card , and have the lamp , paper , and screen , just in line , and then the square shadow will appear sharp and clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then ...
... slit in the postal - card , and have the lamp , paper , and screen , just in line , and then the square shadow will appear sharp and clear on the white screen . With a lead - pencil trace an outline of this shadow on the screen ; then ...
Página 47
... slit in one card , just at the pin - hole , about inch ( 19 millimetres ) long and inch ( 1 millimetre ) wide . Then place this card close to the lamp , as in the other experiment , and set up the other card about fifteen inches away ...
... slit in one card , just at the pin - hole , about inch ( 19 millimetres ) long and inch ( 1 millimetre ) wide . Then place this card close to the lamp , as in the other experiment , and set up the other card about fifteen inches away ...
Página 51
... slits in the card in place of the single hole , you will get a very correct idea of re- peated reflection , and find the tube a source of con- siderable amusement . EXPERIMENTS IN DISPERSED REFLECTION . Get a small piece of black velvet ...
... slits in the card in place of the single hole , you will get a very correct idea of re- peated reflection , and find the tube a source of con- siderable amusement . EXPERIMENTS IN DISPERSED REFLECTION . Get a small piece of black velvet ...
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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