Introduction to Modern PhysicsMcGraw-Hill, 1928 - 596 頁 |
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常見字詞
absorption angles Ångströms assumed atomic heat atomic number atomic weight azimuthal quantum beam black body caloric theory cathode centimeter Chap components computed constant corresponding crystal curve degrees of freedom density determined direction discovery doublets electromagnetic theory electrostatic elements emissive power emitted emittor equation ergs experiment experimental Faraday formula frequency Galileo gases given gives helium hydrogen incident index of refraction integer intensity inverse-square law J. J. Thomson Kepler kinetic energy lines lithium magnetic field mass measurements molecule motion Newton nucleus number of degrees number of electrons observed orbit P₁ particles photoelectric current photoelectric effect physics planets plate quantity quantum theory radiation radius rays reflected result rotation Rydberg constant scattering sodium spectra spectrum sphere substance surface Table temperature tion triplets tube Tycho unit volume velocity of light vibrations wave length wave number X-rays Zeeman effect zero
熱門章節
第 34 頁 - I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea -shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
第 52 頁 - It is hardly necessary to add, that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance ; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
第 40 頁 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
第 39 頁 - Are not gross bodies and light convertible into one another, and may not bodies receive much of their activity from th'e particles of light which enter their composition ? * * * The changing of bodies into light and light into bodies is very conformable to the course of nature, which seems delighted with transmutations.
第 38 頁 - Are not the Rays of Light very small Bodies emitted from shining Substances? For such Bodies will pass through uniform Mediums in right Lines without bending into the Shadow, which is the Nature of the Rays of Light...
第 39 頁 - A dense Fluid can be of no use for explaining the Phaenomena of Nature, the Motions of the Planets and Comets being better explain 'd without it. It serves only to disturb and retard the Motions of those great Bodies, and make the Frame of Nature languish...
第 66 頁 - ELECTRICITY which determines the equivalent number, because it determines the combining force. Or, if we adopt the atomic theory or phraseology, then the atoms of bodies which are equivalents to each other in their ordinary chemical action, have equal quantities of electricity naturally associated with them.
第 40 頁 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
第 39 頁 - And if Natural Philosophy in all its parts, by pursuing this method, shall at length be perfected; the bounds of Moral Philosophy will be also enlarged. For so far as we can know by Natural Philosophy what is the First cause, what power He has over us, and what benefits we receive from Him; so far our duty towards Him, as well as that towards one another, will appear to us by the light of Nature.
第 10 頁 - His hypotheses are that the fixed stars and the sun remain unmoved, that the earth revolves about the sun in the circumference of a circle, the sun lying in the middle of the orbit...