An Elementary Treatise on Geometrical Optics |
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Page 7
... at an obliquity of 60 ° . The illuminations of the screen from the two sources being equal , show that one source is 18 times as bright as the other . 2. A small white surface being placed horizontally on a 6-7 . ] 7 EXAMPLES .
... at an obliquity of 60 ° . The illuminations of the screen from the two sources being equal , show that one source is 18 times as bright as the other . 2. A small white surface being placed horizontally on a 6-7 . ] 7 EXAMPLES .
Page 8
... placed at the centre of the polygon will be equally bright on both sides , whatever be the orientation of its plane . 4. A small plane area is placed at right angles to the axis of a paraboloid of revolution whose convex surface is ...
... placed at the centre of the polygon will be equally bright on both sides , whatever be the orientation of its plane . 4. A small plane area is placed at right angles to the axis of a paraboloid of revolution whose convex surface is ...
Page 19
... placed under the surface of still water . All external objects would appear compressed within a conical space whose axis is vertical and semi - vertical angle 48 ° 27 ' 40 " , the objects near the horizon being much distorted . Beyond ...
... placed under the surface of still water . All external objects would appear compressed within a conical space whose axis is vertical and semi - vertical angle 48 ° 27 ' 40 " , the objects near the horizon being much distorted . Beyond ...
Page 30
... placed in contact with their edges parallel and their angles turned opposite ways ; prove that the deviation due to the system of a ray which is incident perpendicularly on the first surface of the system increases with the angle of the ...
... placed in contact with their edges parallel and their angles turned opposite ways ; prove that the deviation due to the system of a ray which is incident perpendicularly on the first surface of the system increases with the angle of the ...
Page 32
... placed so that each of the former touches one face of the latter , and the angle of the middle prism is turned in a direction opposite to that of the angles of the other two . A ray passes through the system in such a direction that its ...
... placed so that each of the former touches one face of the latter , and the angle of the middle prism is turned in a direction opposite to that of the angles of the other two . A ray passes through the system in such a direction that its ...
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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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