Optical Theories Based on Lectures Delivered Before the Calcutta UniversityUniversity Press, 1917 - 181 頁 |
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常見字詞
A₁ a²x² angle assume axes axis bodies circuit condition conductor constant corpuscles density dielectric direction discharge disturbance double refraction dx dydz dy dz elastic medium elastic solid theory electric charge electric current electric displacement electro-magnetic field electrostatic element of volume equations of motion ether ethereal medium explain fluid free ether hypothesis incidence incompressible ionisation ions J. J. Thomson kinetic energy magnetic force Maxwell molecular rotation normal Nyaya Nyaya Sutra optical phenomena ordinary ray particles perpendicular plane of polarisation postulate potential energy pressure propagation of light properties quantities rays of light reflection and refraction regard result strain stress suppose surface integral tube undulatory theory V₁ velocity of light velocity of propagation vibrations wave front дв ди дх дх дх მყ
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第 13 頁 - To me the fundamental supposition itself seems impossible — namely, that the waves or vibrations of any fluid can, like the rays of light, be propagated in straight lines, without a continual and very extravagant spreading and bending every way into the quiescent medium, where they are terminated by it. I mistake if there be not both experiment and demonstration to the contrary.
第 51 頁 - To fill all space with a new medium whenever any new phenomenon is to be explained is by no means philosophical, but if the study of two different branches of science has independently suggested the idea of a medium, and if the properties which must be attributed to the medium in order to account for electromagnetic phenomena are of the same kind as those which we attribute to the luminiferous medium in order to account for the phenomena of light, the evidence fer the physical existence of the medium...
第 15 頁 - The returns of the disposition of any ray, to be reflected, I will call its Fits of easy reflexion, and those of its disposition to be transmitted, its Fits of easy transmission...
第 101 頁 - The consideration of the action of magnetism on polarized light leads, as we have seen, to the conclusion that in a medium under the action of magnetic force something belonging to the same mathematical class as an angular velocity, whose axis is in the direction of the magnetic force, forms a part of the phenomenon.
第 173 頁 - PRESS. SELECTION FROM THE GENERAL CATALOGUE OF BOOKS PUBLISHED BY THE CAMBRIDGE UNIVERSITY PRESS The Effect of the War on the External Trade of the United Kingdom.
第 24 頁 - ... may be reconciled. Suppose a small quantity of glue dissolved in a little water, so as to form a stiff jelly. This jelly forms in fact an elastic solid : it may be constrained, and it will resist constraint, and return to its original form when the constraining force is removed, by virtue of its elasticity ; but if we constrain it too far it will break. Suppose now the quantity of water in which the glue is dissolved...
第 15 頁 - ... every ray of light in its passage through any refracting surface is put into a certain transient constitution or state, which in the progress of the ray returns at equal intervals and disposes the ray at every return to be easily refracted through the next refracting surface and between the returns to be easily reflected by it.
第 18 頁 - In the second place, it is to be supposed that the ether is a vibrating medium like air, only the vibrations far more swift and minute; those of air made by a man's ordinary voice succeeding one another at more than half a foot or a foot distance, but those of ether at a less distance than the hundred-thousandth part of an inch.
第 16 頁 - The reason why the surfaces of all thick transparent bodies reflect part of the light incident on them and refract the rest is that some rays at their incidence are in their fits of easy reflexion, some in their fits of easy transmission.
第 17 頁 - If it consisted in pression or motion, propagated either in an instant, or in time, it would bend into the shadow. For pression or motion cannot be propagated in a fluid in right lines beyond an obstacle which stops part of the motion, but will bend and spread every way into the quiescent medium which lies beyond the obstacle.