Mathematical Tracts on the Lunar and Planetary Theories, the Figure of the Earth, Precession and Nutation, the Calculus of Variations, and the Undulatory Theory of Optics: Designed for the Use of Students in the University |
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Page 6
... PROP . 2. The orbit which the Sun appears to describe about a planet is a conic section . Let M = mass of Sun ( estimated by the accelerating force which its attraction produces at distance 1 ) , M ' = that of the planet : let their ...
... PROP . 2. The orbit which the Sun appears to describe about a planet is a conic section . Let M = mass of Sun ( estimated by the accelerating force which its attraction produces at distance 1 ) , M ' = that of the planet : let their ...
Page 12
... PROP . 5. The centre of gravity of the Earth and Moon describes about the Sun , very nearly , an ellipse in one plane , and the area passed over by its radius vector is very nearly proportional to the time . Let E and M , ( fig . 1 ...
... PROP . 5. The centre of gravity of the Earth and Moon describes about the Sun , very nearly , an ellipse in one plane , and the area passed over by its radius vector is very nearly proportional to the time . Let E and M , ( fig . 1 ...
Page 15
... PROP . 6. To find the resolved part of the Sun's dis- turbing force on the Moon , in the direction of the projection of the radius vector on the ecliptic . Let E , M , m ' , ( fig . 2. ) , be the Earth , Moon , and Sun : G the center of ...
... PROP . 6. To find the resolved part of the Sun's dis- turbing force on the Moon , in the direction of the projection of the radius vector on the ecliptic . Let E , M , m ' , ( fig . 2. ) , be the Earth , Moon , and Sun : G the center of ...
Page 17
... PROP . 7. To find the resolved part of the disturbing force , which is parallel to the plane of the ecliptic , and per- pendicular to the projection of the radius vector . The only force which acts in this direction on M is the resolved ...
... PROP . 7. To find the resolved part of the disturbing force , which is parallel to the plane of the ecliptic , and per- pendicular to the projection of the radius vector . The only force which acts in this direction on M is the resolved ...
Page 21
... PROP . 11. To eliminate t from the differential equations . Since , in their present form , t is the independent variable , we must take some other quantity for the independent variable . d Let this be 0. Now by equation ( b ) , ( d ) ...
... PROP . 11. To eliminate t from the differential equations . Since , in their present form , t is the independent variable , we must take some other quantity for the independent variable . d Let this be 0. Now by equation ( b ) , ( d ) ...
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Mathematical Tracts on the Lunar and Planetary Theories, the Figure of the ... George Biddell Airy No preview available - 2018 |
Mathematical Tracts on the Lunar and Planetary Theories, the Figure of the ... George Biddell Airy No preview available - 2015 |
Mathematical Tracts on the Lunar and Planetary Theories, the Figure of the ... George Biddell Airy No preview available - 2018 |
Common terms and phrases
analyzing plate angle angle of incidence angular velocity attraction axes axis bright co-ordinates coefficient common light Consequently cos² crystal curve density different colours differential direction displacement distance disturbing force dR dR dt dt dx dx Earth ellipticity equal equation expression extraordinary ray Fresnel's rhomb front function ƒ² glass Hence integration intensity investigation length longitude lunar Moon Moon's motion multiplied nearly Newton's rings nutation orbit ordinary ray parallel particles perigee perihelion perpendicular plane of incidence plane of polarization plane of reflection precession principal plane produced PROP proportion quantity refraction rhombohedron rings shews sin² spheroid suppose surface true anomaly undulation vibration vt-x wave
Popular passages
Page 12 - The centre of gravity of the Earth and Moon describes about the Sun, very nearly, an ellipse in one plane, and the area passed over by its radius vector is very nearly proportional to the time.
Page 285 - We have every reason to think that a part of the velocity of sound depends on the circumstance that the law of elasticity of the air is altered by the instantaneous developement of latent heat on compression, or the contrary effect on expansion. Now if this heat required time for its developement, the quantity of heat developed would depend on the time during which the particles remained in nearly the same relative state; that is, on the time of vibration. Consequently...
Page 286 - Now, if this heat required time for its development, the quantity of heat developed would depend upon the time during which the particles remained in nearly the same relative state, that is, on the time of vibration. Consequently, the law of elasticity would be different for different times of vibration, or for different lengths of waves ; and therefore the velocity of transmission would be different for waves of different lengths. If we suppose some cause which is put in action by the vibration...
Page 339 - On considering this presumption in conjunction with the second and third conclusions, we easily arrive at this simple hypothesis explaining the whole : Common light consists of undulations in which the vibrations of each particle are in the plane perpendicular to the direction of the wave's motion. The polarization of light is the resolution of the vibrations of each particle into two, one parallel to a given plane passing through the direction of the...
Page 343 - ... that there are three directions^" at right angles to each other, in which if a particle be disturbed, the resultant of the forces * M.
Page 343 - To explain the separation of common light into two pencils by doubly refracting crystals : and to account for the polarization of the two rays in planes at. right angles to each other.
Page 255 - I* when a single undulation' only is considered. It is to be observed that a is the maximum vibration of any particle. PROP. 5. To explain the interference of undulations. 9. By interference is meant the co-existence of two undulations in which the length of a wave is the same. The conception of interference is not in any circumstances...
Page 284 - ... and this will cause a reflected wave. Thus when light passes through glass there will be reflection at both surfaces. But there is this difference between th'e two reflections : one is caused by a vibration in the same direction as that of the incident ray, and the other by a vibration in the direction opposite to that of the incident ray. We shall find this distinction important in explaining a fundamental experiment (65). The same thing may be thus shewn. If we suppose a mass of glass to be...