An Experimental Treatise on Optics: Comprehending the Leading Principles of the Science, and an Explanation of the More Important and Curious Optical Instruments and Optical Pheonomena; Being the Third Part of a Course of Natural Philosophy, Compiled for Use of the Students of the University at Cambridge, New England, Τόμος 3Hilliard and Metcalf, 1826 - 350 σελίδες |
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Σελίδα v
... Lenses . Use of these Lenses in correcting shortsightedness Method of determining the Images produced by Converging Lenses . Use of these Lenses in correcting the defective Vision of longsighted Persons 52 Of Magnifying Glasses and ...
... Lenses . Use of these Lenses in correcting shortsightedness Method of determining the Images produced by Converging Lenses . Use of these Lenses in correcting the defective Vision of longsighted Persons 52 Of Magnifying Glasses and ...
Σελίδα vi
... Lenses . 201 Method of M. Arago for determining the Magnifying Power of Optical Instruments Instruments employed in Optical Experiments Camera Obscura 204 206 ib . 207 208 • 209 ib . Megascope Solar Microscope Camera Lucida Organ of ...
... Lenses . 201 Method of M. Arago for determining the Magnifying Power of Optical Instruments Instruments employed in Optical Experiments Camera Obscura 204 206 ib . 207 208 • 209 ib . Megascope Solar Microscope Camera Lucida Organ of ...
Σελίδα 7
... lines ; so that at each point of a curved surface , reflection takes place in exactly the same manner as if the ray fell upon a plane touching this point ; and since we may always calculate the position of the tangent plane for all the ...
... lines ; so that at each point of a curved surface , reflection takes place in exactly the same manner as if the ray fell upon a plane touching this point ; and since we may always calculate the position of the tangent plane for all the ...
Σελίδα 14
... lines which are to be employed as sights . The first condition is easily fulfilled by arranging the plane of the limb along some of the vertical lines presented by the building . This being done , we place the eye very near the crystal ...
... lines which are to be employed as sights . The first condition is easily fulfilled by arranging the plane of the limb along some of the vertical lines presented by the building . This being done , we place the eye very near the crystal ...
Σελίδα 15
... lines of sight may be considered as indefinite . Dr Wollaston was accustomed to place the instru ment in a chamber at some distance from the window , the bars of which were used as sights , and of which the upright parts served to place ...
... lines of sight may be considered as indefinite . Dr Wollaston was accustomed to place the instru ment in a chamber at some distance from the window , the bars of which were used as sights , and of which the upright parts served to place ...
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Άλλες εκδόσεις - Προβολή όλων
An Experimental Treatise on Optics: Comprehending the Leading Principles of ... Professor John Farrar,Jean-Baptiste Biot Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
according achromatic angle of incidence aperture appear attractive forces axes axis beam become blue bodies calculate centre compose consequently crystal density Descartes determine deviation diameter direction dispersion divergence double refraction effect emergent ray equal experiment extraordinary extraordinary ray extreme eye-glass faces focal distance focus formed glass green heliostat homogeneous Iceland spar incident ray inclined interior lamina lens lenses light limits luminous particles luminous rays magnifying manner medium mirror Newton object object-glass oblique observed ordinary ordinary ray parallel pass perpendicular phenomena phenomenon plane plate of air polarisation portion prism produced ratio of refraction red rays refracted rays refracting power refracting telescope refrangibility render repulsive force retina rhomboid rings second surface sensation sensible simple rings sine spectrum spherical spherometer straight line substance suppose takes place telescope thickness thin tint tion transmission transmitted transparent traverse tube unequal velocity violet rays yellow
Δημοφιλή αποσπάσματα
Σελίδα 334 - The violet light was obtained in the usual manner, by means of a common prism, and was collected into a focus by a lens of a suffiOpt.
Σελίδα 305 - ... varies as the square of the cosine of the angle between the plane of transmission of the analyser and the plane of the polariser.
Σελίδα 334 - ... meridian at right angles. The focus of violet rays was carried slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never to touch the other half of the needle. At the end of -half an hour after the needle was exposed to the action of the violet rays, it was carefully examined, and it had acquired neither polarity nor any force of attraction ; but after continuing the operation twenty-five minutes longer,...
Σελίδα 337 - At all other angles also, when the sun's light was reflected from the surface, the color vanished with the inclination, and was equal at equal inclinations on either side. "This experiment affords a very strong confirmation of the theory. It is impossible to deduce any explanation of it from any hypothesis hitherto advanced ; and I believe it would be difficult to invent any other...
Σελίδα 337 - ... lines be placed near each other, they will facilitate the observation. If one of the lines be made to revolve round the other as an axis, the depression below the given plane will be as the sine of the inclination ; and while the eye and the luminous object remain fixed the difference of the length of the paths will vary as this sine. " The best subjects for the experiment are Mr. Coventry's exquisite micrometers; such of them as consist of parallel lines drawn on glass, at a distance of onefive-hundredth...
Σελίδα 225 - Having given the radius of an arc of any colour in the secondary rainbow, find the ratio of the sine of incidence to the sine of refraction when rays of that colour pass out of air into water.