Elements of Physics: Imponderable bodies. II. Electricity, electro-magnetism, and magneto-electricityLongman, Brown, Green, and Longmans, 1846 |
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according æther aperture atmosphere axis become boiling caloric Camera Obscura capacity for heat centre colours complementary colour concave lenses concave mirror consequently convex lens crystal curve degree density diameter diminished dipping needle direction distance earth effect engines equal ether experiment fluid focal focus gases glass plates greater hemisphere horizontal horse-shoe magnets inches intensity iron length lenses liquid looking-glass luminous body luminous point magnetic influence magnifying mercury metal north pole northern hemisphere object object-glass observed opaque opposite oscillations parallel particles perpendicular phenomena piston placed plane mirror plane of reflection polarized portion position prism produced properties quantity rays of light reflected rays refraction rendered retina right angles Second Expt south pole space specific heat steam substances sun's rays supposed surface telescope temperature terrestrial magnetism theory thermometer transmitted transparent tube undulatory vapour velocity vertical vessel vibration whence
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Pagina 90 - Thus in the red space, there is more red than is necessary to make white light with the small portions of yellow and blue which exist there ; in the yellow space, there is more yellow than is necessary to make white light with...
Pagina 90 - Y equal to 3 + 2 + 1, equal to 6 parts of white mixed with 7 parts of yellow ; that is, the compound tint at Y will be a bright yellow without any trace of red or blue.
Pagina 90 - ... at any point mixed with white light. In the red space there is more red than is necessary to make white light with the small portions of yellow and blue which exist there; in the yellow space there is more yellow than is necessary to make white light with the red and blue ; and in the part of the blue space which appears violet there is more red than yellow, and hence the excess of red forms a violet with the blue.
Pagina 90 - ... space in the solar spectrum, the primary yellow spectrum has its maximum in the middle of the yellow space, and the primary blue spectrum has its maximum between the blue and the indigo space. The two minima of each of the three primary spectra coincide at the two extremities of the solar spectrum. From this view of the constitution of the solar spectrum we may draw the following conclusions : — 1. Red, yellow, and blue light exist at every point of the solar spectrum. 2. As a certain portion...