An Elementary Treatise on Geometrical Optics |
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Page 4
... denote the intensity of the light emitted in the direction of the normal to the element . Then μ may be called the intrinsic brightness of the element . 5 * . If Q be the quantity of light which falls on an area A of illuminated surface ...
... denote the intensity of the light emitted in the direction of the normal to the element . Then μ may be called the intrinsic brightness of the element . 5 * . If Q be the quantity of light which falls on an area A of illuminated surface ...
Page 6
... denoted by ; then the illumination due to the small element is μπ By addition we arrive at the following method of determining the illumination of a small area at C due to any finite bright surface . From C'draw radii to all points of ...
... denoted by ; then the illumination due to the small element is μπ By addition we arrive at the following method of determining the illumination of a small area at C due to any finite bright surface . From C'draw radii to all points of ...
Page 13
... denote the angle between the mirrors , and let 01 , 02 , 0 ... be the acute angles 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 ...
... denote the angle between the mirrors , and let 01 , 02 , 0 ... be the acute angles 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 ...
Page 16
... denote the two media by A , B and the refractive index from A into B by μab , and the refractive index from B into A by ba , this experiment shows that sin o sin o ' sin o ' = Hab , sin = μba , with the previous notation ; and therefore ...
... denote the two media by A , B and the refractive index from A into B by μab , and the refractive index from B into A by ba , this experiment shows that sin o sin o ' sin o ' = Hab , sin = μba , with the previous notation ; and therefore ...
Page 17
... denote the vacuum by the suffix v , Mab Mav⋅ Mvb . But μαυ is the reciprocal of μva or the reciprocal of μ , and therefore = Mab = μ ' μ that is , the relative refractive index between any two media may be found by dividing the ...
... denote the vacuum by the suffix v , Mab Mav⋅ Mvb . But μαυ is the reciprocal of μva or the reciprocal of μ , and therefore = Mab = μ ' μ that is , the relative refractive index between any two media may be found by dividing 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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