An Elementary Treatise on Geometrical Optics |
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Page viii
... seen under water . 34 . 35 , 36 . 37 , 38 . Reflexion and refraction of small pencils at spherical surfaces . Direct reflexion of a small pencil at a spherical mirror . Image of an object formed by a spherical mirror . 39-44 . Direct ...
... seen under water . 34 . 35 , 36 . 37 , 38 . Reflexion and refraction of small pencils at spherical surfaces . Direct reflexion of a small pencil at a spherical mirror . Image of an object formed by a spherical mirror . 39-44 . Direct ...
Page 1
... seen into the eye ; it is these vibrations which we shall call light . 2. We know by experience that we can see through certain bodies , such as air , glass and water , but not through others , such as wood , stone and iron ; in other ...
... seen into the eye ; it is these vibrations which we shall call light . 2. We know by experience that we can see through certain bodies , such as air , glass and water , but not through others , such as wood , stone and iron ; in other ...
Page 3
... seen . Corresponding to all the bright points of the luminous body there will be images on the retina , and these images enable us to form a mental picture of an extended surface . 4 * . In general , light from two independent sources ...
... seen . Corresponding to all the bright points of the luminous body there will be images on the retina , and these images enable us to form a mental picture of an extended surface . 4 * . In general , light from two independent sources ...
Page 4
... seen is normal to the line of sight , let the area of the element be w . Then when the tube is directed so that the normal to the element of the bright surface seen through the tube makes an angle ✪ with the line of sight , the area of ...
... seen is normal to the line of sight , let the area of the element be w . Then when the tube is directed so that the normal to the element of the bright surface seen through the tube makes an angle ✪ with the line of sight , the area of ...
Page 6
... seen from C , forming a conical surface . Let the part of the surface of the sphere of unit radius whose centre is C , intercepted within the cone , be pro- jected on the plane of the area at C. If be the area of the projection , the ...
... seen from C , forming a conical surface . Let the part of the surface of the sphere of unit radius whose centre is C , intercepted within the cone , be pro- jected on the plane of the area at C. If be the area of the projection , the ...
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An Elementary Treatise on Geometrical Optics (Classic Reprint) R. S. Heath No preview available - 2016 |
Common terms and phrases
achromatic angle of incidence aperture apparent magnitude astronomical telescope axis B₁ called caustic centre circle coloured concave concave lens conjugate foci converge convex lens corresponding Crown 8vo denote direction distinct vision Edited emerge parallel emergent ray equal equation extreme pencils eye-glass eye-lens eye-piece field of view final image focal length focal plane glass Hence illuminated inches incident ray inclined infinity instrument k₁ lenses linear magnitudes luminous magnifying power meet nodal points normal object object-glass object-mirror P. G. Tait pair of conjugate perpendicular placed plane mirror point Q position principal focus principal plane principal points prism pupil radii radius ray of light rays diverging reflected rays reflexion refracting surface refractive index respectively retina right angles second medium seen small mirror spectrum sphere spherical surface subtended suppose tangent theorem triangles vertex visual angle
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