A Treatise on Physical OpticsDeighton, Bell, 1892 - 411 páginas |
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Página vii
... increases ; but at the same time , it is a great assistance to the imagination to be able to construct a mechanical model of a medium , which represents , even imperfectly , the action of ponderable matter upon ethereal waves . A full ...
... increases ; but at the same time , it is a great assistance to the imagination to be able to construct a mechanical model of a medium , which represents , even imperfectly , the action of ponderable matter upon ethereal waves . A full ...
Página 32
... increase as the angle of incidence increases . For light of different colours , the diameters of the rings vary as λ ; consequently when sunlight is employed , a number of coloured rings are observed . The inner edge of the first ring ...
... increase as the angle of incidence increases . For light of different colours , the diameters of the rings vary as λ ; consequently when sunlight is employed , a number of coloured rings are observed . The inner edge of the first ring ...
Página 33
... increase the angle of incidence until it exceeds the critical angle . Under these circumstances , it will be found that there is still a system of coloured rings , and that the central spot is black ; but the consideration of this ...
... increase the angle of incidence until it exceeds the critical angle . Under these circumstances , it will be found that there is still a system of coloured rings , and that the central spot is black ; but the consideration of this ...
Página 36
... and ultimately fall behind it , the curvature will decrease until the fringes become straight , after which it will increase in the PLANE MIRROR . 37 contrary direction , the convexity being 36 COLOURS OF THIN AND THICK PLATES .
... and ultimately fall behind it , the curvature will decrease until the fringes become straight , after which it will increase in the PLANE MIRROR . 37 contrary direction , the convexity being 36 COLOURS OF THIN AND THICK PLATES .
Página 61
... increase algebraically in passing from the red to the blue . This will be the case when the retarding plate is held at the side on which the blue is seen . In this case is positive ; and since varies as the thickness of the plate , g ...
... increase algebraically in passing from the red to the blue . This will be the case when the retarding plate is held at the side on which the blue is seen . In this case is positive ; and since varies as the thickness of the plate , g ...
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Otras ediciones - Ver todas
Términos y frases comunes
A₁ accordingly amplitude angle of incidence aperture axis bands biaxal crystal centre change of phase circularly polarized colours cos² critical angle diffraction direction of vibration displacement dx dy elastic ellipsoid elliptically polarized equal equations of motion ether extraordinary ray extraordinary wave follows formulæ Fresnel's glass Hence Iceland spar incident light index of refraction integral intensity light is incident light is polarized Lord Rayleigh medium Nicol normal obtain optic axes parallel perpendicular plane of incidence plane of polarization plate of quartz polarized light polarized perpendicularly polarizing angle prism produced quantity quartz reflected and refracted reflected light refracted wave rhomb right-handed rings rotation sin² spectrum suppose surface theory thickness transmitted transparent U₁ uniaxal crystal V₁ values velocity of propagation wave-front wave-length wave-surface whence whilst μ²
Pasajes populares
Página 372 - Nicol's prism turned in any way. [Shown.] (5) The spectrum of the reflected light is frequently found to consist almost entirely of a comparatively narrow band. When the angle of incidence is increased, the band moves in the direction of increasing refrangibility, and at the same time increases rapidly in width. In many cases the reflection appears to be almost total.
Página 356 - The difference between these numbers is greater than can be accounted for by errors of observation, and shows that our theories of the structure of bodies must be much improved before we can deduce their optical from their electrical properties. At the same time, I think that the agreement of the numbers is such that if no greater discrepancy were found between the numbers derived from the optical and...
Página 347 - 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 for the physical existence of the medium...
Página 347 - But the properties of bodies are capable of quantitative measurement. We therefore obtain the numerical value of some property of the medium, such as the velocity with which a disturbance is propagated through it, which can be calculated from electromagnetic experiments, and also observed directly in the case of light. If it should be found that the velocity of propagation of electromagnetic disturbances is the same as the velocity of light, and this not only in air, but in other transparent media,...