A Treatise on Optics; or, light and sight, theoretically and practically treated; with the application to fine art and industrial pursuits |
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Page 3
... surfaces of bodies , and entering the pupil of the eye ; but Plato and Empedocles supposed that the cause of vision is something emanating from the eye , which , meeting with something else that proceeds from the object , is thereby ...
... surfaces of bodies , and entering the pupil of the eye ; but Plato and Empedocles supposed that the cause of vision is something emanating from the eye , which , meeting with something else that proceeds from the object , is thereby ...
Page 9
... surface of the water . This bending of the ray Ah B is called refraction , from a Latin word , which means breaking back , because the ray A h в seems to be broken back from its course at B , and the water is said to refract or break ...
... surface of the water . This bending of the ray Ah B is called refraction , from a Latin word , which means breaking back , because the ray A h в seems to be broken back from its course at B , and the water is said to refract or break ...
Page 10
... surface of salt water , alcohol , oil , or glass ; but with these substances we must place the shilling beyond D towards z , so that it may be seen at A. Hence we are led to conclude that when a ray of light . passing through a liquid ...
... surface of salt water , alcohol , oil , or glass ; but with these substances we must place the shilling beyond D towards z , so that it may be seen at A. Hence we are led to conclude that when a ray of light . passing through a liquid ...
Page 12
... surface of water . If we want to find the direction of the ray ac ( Fig . 2 ) for example , when it is refracted after falling on the surface TU of water at the point c . Draw CR perpendicular to TU , and from a draw ab perpendicular to ...
... surface of water . If we want to find the direction of the ray ac ( Fig . 2 ) for example , when it is refracted after falling on the surface TU of water at the point c . Draw CR perpendicular to TU , and from a draw ab perpendicular to ...
Page 18
... surfaces , parallel to one another . 3. A spherical lens , shown at u , is a sphere , having every point in its surface equally distant from the common centre . 4. A double convex lens , shown at D , is a solid , bounded by two convex ...
... surfaces , parallel to one another . 3. A spherical lens , shown at u , is a sphere , having every point in its surface equally distant from the common centre . 4. A double convex lens , shown at D , is a solid , bounded by two convex ...
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Common terms and phrases
achromatic acid actinic angle of incidence aperture apparatus Argand lamps axis blue body called camera centre cloth colour combination construction converging convex lens cornea crown crown-glass crystal crystalline crystalline lens curvature diameter diaphragm direction disc dispersive power diverging Edition Engravings equal eye-glass fall Fcap flint flint-glass focal distance focal length foci focus gilt edges glass heliostat horizontal illumination Illustrations inches inclined index of refraction lamp lantern lenses limb magnifying power meniscus microscope object-glass observer obtained optical instrument oxyhydrogen paper parallel rays passing pencil perpendicular Phenakistoscope photographic picture placed plane plate polarised prism produced radius radius of curvature rays of light reflected reflector retina screen screw seen shown in Fig side Sir David Brewster slides solar spectrum speculum spherical aberration substance surface telescope theodolite tion transparent tube violet visible vitreous humour yellow
Popular passages
Page 74 - To the same degree of Refrangibility ever belongs the same colour, and to the same colour ever belongs the same degree of Refrangibility.
Page 12 - This amounts to the same with saying, that, in the case before us, the sine of the angle of incidence is to the sine of the angle of refraction in a given ratio.
Page 5 - THE PRINCE OF THE HOUSE OF DAVID; or, Three Years in the Holy City.
Page 26 - Lamborn. 2s. 134. METALLURGY OF SILVER AND LEAD, by RH Lamborn. 2s. 135. ELECTRO-METALLURGY, by A. Watt. Is. 6d. 138. HANDBOOK OF THE TELEGRAPH, by R. Bond. Is. 143. EXPERIMENTAL ESSAYS— On the Motion of Camphor and Modern Theory of Dew, by C. Tomlinson. Is.
Page 102 - Thus, if the light be homogeneous, a bright line of light will be formed under the centre of the opaque object AB, outside which will be dark lines, and then bright and dark lines alternately. If the arrangement of these lines be examined, they will be found to be hyperbolic, as exhibited in Jig.
Page 74 - ... very little of the violet. The yellow space, which has not been much absorbed, has increased in breadth. It occupies part of the space formerly covered by the orange on one side, and part of the space formerly covered by the green on the other. Hence it follows, that the blue glass has absorbed the red light, which, when mixed with the yellow light, constituted orange, and has absorbed also the blue light, which, when mixed with the yellow, constituted the part of the green space next to the...
Page 26 - EMMENS. is. 6d. 152. PRACTICAL HINTS FOR INVESTING MONEY. With an Explanation of the Mode of Transacting Business on the Stock Exchange. By FRANCIS PLAYFORD, Sworn Broker.
Page 24 - Is. 34. STEAM ENGINE, by Dr. Lardner. Is. 59. STEAM BOILERS, their Construction and Management, by R. Armstrong. With Additions by R. Mallet. Is.
Page 73 - Coloured fluids, such as black and red ink, though equally homogeneous, stop or absorb different kinds of rays, and when exposed to the sun they become heated in different degrees ; while pure water seems to transmit all the rays equally, and scarcely receives any heat from the passing light of the sun. When we examine more. minutely the action of...
Page 26 - Is, 79**. PHOTOGRAPHY, the Stereoscope, &c., from the French of D. Van Monckhoven, by WH Thornthwaite. Is. Gd. 96. ASTRONOMY, by the Rev. R. Main. New and Enlarged Edition, with an Appendix on