An Elementary Treatise on Geometrical Optics |
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Page 2
... the body ) 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 .
... the body ) 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
... retina of the eye . Let P be any point of the object , p the corresponding point of the picture on the retina ; then it will be shown afterwards that the line Pp passes through the fixed point O , the optical centre of the eye . Let S ...
... retina of the eye . Let P be any point of the object , p the corresponding point of the picture on the retina ; then it will be shown afterwards that the line Pp passes through the fixed point O , the optical centre of the eye . Let S ...
Page 7
... retina cannot distinguish it from a point . In this case the brightness must be measured simply by the quan- tity of light ; and therefore , by the same investigation , the brightness varies inversely as R2 . EXAMPLES * . 1. The light ...
... retina cannot distinguish it from a point . In this case the brightness must be measured simply by the quan- tity of light ; and therefore , by the same investigation , the brightness varies inversely as R2 . EXAMPLES * . 1. The light ...
Page 122
... retina is filled with another transparent fluid , somewhat more viscous than the former , and called the vitreous humour . These two hu- mours , like the crystalline lens , are contained in trans- parent membranous capsules of great ...
... retina is filled with another transparent fluid , somewhat more viscous than the former , and called the vitreous humour . These two hu- mours , like the crystalline lens , are contained in trans- parent membranous capsules of great ...
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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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