An Elementary Treatise on Geometrical Optics |
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Page viii
... formed by a spherical mirror . 39-44 . Direct refraction of a small pencil at a spherical surface . 45. Image of an object formed by refraction at a spherical surface . 46-48 . Geometrical constructions . 49. Helmholtz ' theorem ...
... formed by a spherical mirror . 39-44 . Direct refraction of a small pencil at a spherical surface . 45. Image of an object formed by refraction at a spherical surface . 46-48 . Geometrical constructions . 49. Helmholtz ' theorem ...
Page 2
... ) is giving out light in all directions ; a pencil of rays limited by the aperture of the eye is by the aid of the refracting surfaces of the eye brought to a focus on the retina , forming 2 [ CHAP . I. PROPERTIES OF LIGHT .
... ) is giving out light in all directions ; a pencil of rays limited by the aperture of the eye is by the aid of the refracting surfaces of the eye brought to a focus on the retina , forming 2 [ CHAP . I. PROPERTIES OF LIGHT .
Page 3
Robert Samuel Heath. eye brought to a focus on the retina , forming an image there ; and it is by means of this image that the point is seen . Corresponding to all the bright points of the luminous body there will be images on the retina ...
Robert Samuel Heath. eye brought to a focus on the retina , forming an image there ; and it is by means of this image that the point is seen . Corresponding to all the bright points of the luminous body there will be images on the retina ...
Page 6
... 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 illumination of ...
... 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 illumination of ...
Page 13
... formed by the ray with the reflecting surfaces at the successive incidences . Thus the angles at Q are each 0 ,, those at R , 2 , and so on ; so that from the triangle QOR we find 0 , 0 , + e , and similarly 01 = 02 + € , & c . These ...
... formed by the ray with the reflecting surfaces at the successive incidences . Thus the angles at Q are each 0 ,, those at R , 2 , and so on ; so that from the triangle QOR we find 0 , 0 , + e , and similarly 01 = 02 + € , & c . These ...
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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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