An Elementary Treatise on Geometrical Optics |
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Page 2
... position our eyes will intercept a different small portion of the light . It is thus often convenient to consider the portion of light which travels along some particular line in space apart from the rest ; such a portion of light is ...
... position our eyes will intercept a different small portion of the light . It is thus often convenient to consider the portion of light which travels along some particular line in space apart from the rest ; such a portion of light is ...
Page 8
... position of a point in the plane of the triangle , such that the illuminations at that point received from the three rectangles may be equal . 7. A luminous point is placed on the axis of a truncated conical shell ; prove that the whole ...
... position of a point in the plane of the triangle , such that the illuminations at that point received from the three rectangles may be equal . 7. A luminous point is placed on the axis of a truncated conical shell ; prove that the whole ...
Page 10
... position of the final ray , is called the deviation of the ray . The law according to which a ray of light is reflected at a surface may be thus stated . The angles of incidence and reflexion always lie in the same plane and are equal ...
... position of the final ray , is called the deviation of the ray . The law according to which a ray of light is reflected at a surface may be thus stated . The angles of incidence and reflexion always lie in the same plane and are equal ...
Page 21
... position OAB , to the position OT in which it touches the circle , the angle will be made to increase from 0 to π , and during this * This proof is due to Prof. P. G. Tait . change D is increasing also . This proves that the 18-20 ...
... position OAB , to the position OT in which it touches the circle , the angle will be made to increase from 0 to π , and during this * This proof is due to Prof. P. G. Tait . change D is increasing also . This proves that the 18-20 ...
Page 27
... position of the normal to the second face and RS ' the emergent ray . Then , as may be seen from the figure , the angle of incidence at the second face is increased ; hence the deviation at the second face is increased . The ray is ...
... position of the normal to the second face and RS ' the emergent ray . Then , as may be seen from the figure , the angle of incidence at the second face is increased ; hence the deviation at the second face is increased . The ray is ...
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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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