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" This is effected by placing between the lens and its principal focus, a plane mirror inclined at an angle of 45 to the axis of the lens. "
Elements of Physics: Imponderable bodies. II. Electricity, electro-magnetism ...
di Carl Friedrich Peschel - 1846
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Knight's American Mechanical Dictionary: A Description of Tools ..., Volume 3

Edward Henry Knight - 1876 - 2831 pagine
...places the object outside of the tube of the microscope, and reflects its image to the speculum by means of a plane mirror, inclined at an angle of 45 to the axis of the former. Re-flect'mg-tel'e-scope. A telescope in which the rays are received upon an object-mirror and...
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A Treatise on Geometrical Optics

Robert Samuel Heath - 1887 - 356 pagine
...thrown into a horizontal position. This is effected by placing between the lens and its principal focus, a plane mirror inclined at an angle of 45 to the axis of the lens. This is the principle of the portable camera obscura. A box from which external light is excluded is...
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An Elementary Treatise on Geometrical Optics

Robert Samuel Heath - 1888 - 235 pagine
...thrown into a horizontal position. This is effected by placing between the lens and its principal focus, a plane mirror inclined at an angle of 45 to the axis of the lens. This is the principle of the portable camera obscura. A box from which external light is excluded is...
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The Century Dictionary: An Encyclopedic Lexicon of the English ..., Parte 13

1890
...position of rotating stage ; ey, quartz plate, which slides ita Image to the spt'Cllannerine objective. . mirror inclined at an angle of 45* to the axis of the former.— Solar, lucernai, and oxyhydrogen microscopes, instruments in which the illumination eramicroseismograph...
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Experimental Physics

Eugene Lommel - 1899 - 664 pagine
...object into an inverted image at a. Before the rays are focussed, however, they are reflected from a plane mirror,^, inclined at an angle of 45 to the axis of the tube, so that the image actually lies at b. It is then viewed by means of a convex ocular placed in...
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Everybody's Cyclopedia: A Concise and Accurate Compilation of the ..., Volume 4

Charles Leonard-Stuart - 1912
...placed outside of the tube of the microscope, and reflects its image to the speculum by means of a plain mirror, inclined at an angle of 45 to the axis of the former. Reflecting Telescope, a telescope in which the rays are received on an object-mirror and conveyed...
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