Mathematical and Physical Papers, المجلد 4University Press, 1904 |
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الصفحة 12
... determine , in the case of substances which are sufficiently sensitive to admit with advantage of such a mode of observation , the composition of the fluorescent light . For this purpose it is often better to isolate the object by ...
... determine , in the case of substances which are sufficiently sensitive to admit with advantage of such a mode of observation , the composition of the fluorescent light . For this purpose it is often better to isolate the object by ...
الصفحة 15
... determine , in the case of the more sensitive substances , the composition of the fluorescent light . It is not generally so convenient as the method which involves the use of absorbing media alone for determining which among a group of ...
... determine , in the case of the more sensitive substances , the composition of the fluorescent light . It is not generally so convenient as the method which involves the use of absorbing media alone for determining which among a group of ...
الصفحة 27
... it is as easy to determine the mode of absorption of an absorbing medium with respect to the invisible , as with respect to the visible rays . It is sufficient to interpose AND THE EXHIBITION THEREBY OF THE CHEMICAL RAYS . 27.
... it is as easy to determine the mode of absorption of an absorbing medium with respect to the invisible , as with respect to the visible rays . It is sufficient to interpose AND THE EXHIBITION THEREBY OF THE CHEMICAL RAYS . 27.
الصفحة 31
... determined by the condition of maximum contrast of tint . Now consider what takes place when an image of such a system is thrown on a sensitive plate , prepared suppose by means of bromide of silver . The rays of any one refrangibility ...
... determined by the condition of maximum contrast of tint . Now consider what takes place when an image of such a system is thrown on a sensitive plate , prepared suppose by means of bromide of silver . The rays of any one refrangibility ...
الصفحة 32
... determine the rings are so different in the two cases that it is no wonder that the character of the rings seen on a photograph should differ in some respects from that of the rings seen directly . · But not only is a difference of ...
... determine the rings are so different in the two cases that it is no wonder that the character of the rings seen on a photograph should differ in some respects from that of the rings seen directly . · But not only is a difference of ...
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عبارات ومصطلحات مألوفة
absorbing achromatic acid æsculin alizarine amplitude angle of incidence appear arbitrary constants bands of absorption blue bright bands bright lines chemical chlorophyll coefficients colouring matter corresponding cos² crystal dark lines descending series determined differential direction dispersion divergent series double refraction electrodes employed equation ether examined exhibited experiment expression fixed lines fluid fluorescent light formulæ Fresnel function glass green hæmatine Hence high refrangibility integral intensity invisible rays lens light polarized light reflected MacCullagh medium metallic motion nearly observed obtained optical paper passing paviin perpendicular plane of incidence positive present principal plane prism produced purpurine quantity quinine reflected light reflexion refractive indices respect result rings salt seen sin² solar spectrum solution Stokes substance supposed surface theory tint titanic acid transmitted light transparent velocity of propagation vibrations visible spectrum wave wave-surface yellow
مقاطع مشهورة
الصفحة 132 - Prof. Stokes mentioned to me at Cambridge some time ago, probably about ten years, that Prof. Miller had made an experiment testing to a very high degree of accuracy the agreement of the double dark line D of the solar spectrum with the double bright line constituting the spectrum of the spirit-lamp burning with salt.
الصفحة 131 - ... be opaque with respect to heat radiated by themselves. Considering, therefore, the heat of any temperature to consist of heterogeneous rays, we may state the law thus : " The absorption of a plate equals its radiation, and that for every description of heat.
الصفحة 279 - An Essay on the application of Mathematical Analysis to the Theories of Electricity and Magnetism...
الصفحة 366 - ... the highest. If so, in case the vapour showed its presence by absorption but not emission, it follows, from the correspondence between absorption and emission, that at one temperature the dark line which would be the most sensitive indication of the presence of the substance would be A, at another C, at a third E. Hence, while I regard the facts you mention as evidence of the high temperature of the sun, I do not regard them as conclusive evidence of the dissociation of the molecule of calcium....
الصفحة 130 - ... same refrangibility which traverse it, seems readily to admit of a dynamical illustration borrowed from sound. We know that a stretched string which on being struck gives out a certain note (suppose its fundamental note) is capable of being thrown into the same state of vibration by aerial vibrations corresponding to the same note. Suppose now a portion of space to contain a great number of such stretched strings, forming thus the analogue of a "medium.
الصفحة 136 - I have never attempted to claim for myself any part of Kirchhoff's admirable discovery, and cannot help thinking that some of my friends have been over zealous in my cause.
الصفحة 130 - We know that a stretched string which, on being struck, gives out a certain note (suppose its fundamental note), is capable of being thrown into the same state of vibration by aerial vibrations corresponding to the same note. Suppose, now, a portion of space to contain a great number of such stretched strings, forming thus the analogue of a " medium." It is evident that such a medium, on being agitated, would give out the note above mentioned; while, on the other hand, if that note were sounded in...
الصفحة 133 - ... have its temperature raised by light from the source of the precise quality in question. In the atmosphere around the sun, therefore, there must be present vapour of sodium, which, according to the mechanical explanation thus suggested, being particularly opaque for light of that quality, prevents such of it as is emitted from the sun from penetrating to any considerable distance through the surrunding atmosphere. The test of this theory must be had in ascertaining whether or not vapour of sodium...
الصفحة 302 - Now conceive the periodic time of tlii' motion to be continually diminished. Gradually the alternation of movement becomes too rapid to permit of the full establishment of the merely local reciprocating flow ; the air is sensibly compressed and rarefied, and a sensible sound-wave (or wave of the same nature, in case the periodic time be beyond the limits suitable to hearing) is propagated to a distance.