An Elementary Treatise on Geometrical Optics |
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Page 3
... 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 may ...
... 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 may ...
Page 6
... 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 be the area of a small object and s that of the picture and ...
... 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 be the area of a small object and s that of the picture and ...
Page 14
... corresponding inci- dence is direct , and the ray will return by the same path . When becomes greater than 7 reflexions will cease ; for the ray becomes either parallel to one of the mirrors or meets it only when produced backwards . If ...
... corresponding inci- dence is direct , and the ray will return by the same path . When becomes greater than 7 reflexions will cease ; for the ray becomes either parallel to one of the mirrors or meets it only when produced backwards . If ...
Page 18
... corresponding value for sin becomes greater than unity ; so that the law of refraction fails to give a real direction for the refracted ray . -1 The angle sin ( u / ) , or , the greatest angle at which a ray of light proceeding in the ...
... corresponding value for sin becomes greater than unity ; so that the law of refraction fails to give a real direction for the refracted ray . -1 The angle sin ( u / ) , or , the greatest angle at which a ray of light proceeding in the ...
Page 19
... corresponding theorems for reflexion by making the same substitution = -μ . 18. There are two other useful theorems relating to the incident and refracted rays . The angles which the incident and refracted rays make with any plane ...
... corresponding theorems for reflexion by making the same substitution = -μ . 18. There are two other useful theorems relating to the incident and refracted rays . The angles which the incident and refracted rays make with any plane ...
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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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