An Elementary Treatise on Geometrical Optics |
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Page 4
... the element . ω , μ * The normal at any point of a surface is the straight line through that point perpendicular to the tangent plane to the surface . We must next find the value of w . With 4 [ CHAP . I. EMISSION OF LIGHT .
... the element . ω , μ * The normal at any point of a surface is the straight line through that point perpendicular to the tangent plane to the surface . We must next find the value of w . With 4 [ CHAP . I. EMISSION OF LIGHT .
Page 8
... perpendicular to the lamina . Prove that the illumination at the centre of the plane area is πal ( a2 + c2 ) . 6. The sides of a triangle are the bases of three infinite rect- angles of the same brightness , whose planes are perpendicular ...
... perpendicular to the lamina . Prove that the illumination at the centre of the plane area is πal ( a2 + c2 ) . 6. The sides of a triangle are the bases of three infinite rect- angles of the same brightness , whose planes are perpendicular ...
Page 10
... perpendicular PN be drawn to the reflecting plane and be produced to P ' so that P'N is equal to PN , then in the triangles PNQ , P'NQ , the two sides PN , NQ are equal to the two sides P'N , NQ , each to each , and the * See note to p ...
... perpendicular PN be drawn to the reflecting plane and be produced to P ' so that P'N is equal to PN , then in the triangles PNQ , P'NQ , the two sides PN , NQ are equal to the two sides P'N , NQ , each to each , and the * See note to p ...
Page 13
... perpendicular to both mirrors . B e S A Let OA , OB be the plane mirrors and let PQRST ... be the ray of light which is reflected successively at Q , R , S , T ... 19 Let e denote the angle between the mirrors , and let 01 , 02 , 0 ...
... perpendicular to both mirrors . B e S A Let OA , OB be the plane mirrors and let PQRST ... be the ray of light which is reflected successively at Q , R , S , T ... 19 Let e denote the angle between the mirrors , and let 01 , 02 , 0 ...
Page 14
... perpendicular to the line of intersection of the mirrors , the preceding in- vestigation will apply to the projection of the path of the ray on such a plane . If , further , we remember that the inclination of the ray to this plane ...
... perpendicular to the line of intersection of the mirrors , the preceding in- vestigation will apply to the projection of the path of the ray on such a plane . If , further , we remember that the inclination of the ray to this 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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