An Elementary Treatise on Geometrical Optics |
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Page 2
... of the body ) is giving out light in all directions ; a pencil of rays limited by the aperture of the eye is by the aid of the refracting surfaces of the eye brought to a focus on the retina , forming 2 [ CHAP . I. PROPERTIES OF LIGHT .
... of the body ) is giving out light in all directions ; a pencil of rays limited by the aperture of the eye is by the aid of the refracting surfaces of the eye brought to a focus on the retina , forming 2 [ CHAP . I. PROPERTIES OF LIGHT .
Page 3
... directions , but the intensity of emission is different for different directions . The law of emission is given by a ... direction is proportional to the cosine of the inclination of the 1-2 2-4 . ] 3 EMISSION OF LIGHT . Law of emission ...
... directions , but the intensity of emission is different for different directions . The law of emission is given by a ... direction is proportional to the cosine of the inclination of the 1-2 2-4 . ] 3 EMISSION OF LIGHT . Law of emission ...
Page 4
... direction making an angle 0 with the normal to the element ; then the whole amount of light transmitted to the eye when the element is inclined to the line of sight at an angle 0 is w sec 0.ƒ ( 0 ) . But this , by experiment is ...
... direction making an angle 0 with the normal to the element ; then the whole amount of light transmitted to the eye when the element is inclined to the line of sight at an angle 0 is w sec 0.ƒ ( 0 ) . But this , by experiment is ...
Page 9
... direction changed according to another law ; this portion is said to be refracted into the new medium . ( iii ) A ... directions . When a ray of light is incident on a solid opaque body , the second portion does not exist , and all the ...
... direction changed according to another law ; this portion is said to be refracted into the new medium . ( iii ) A ... directions . When a ray of light is incident on a solid opaque body , the second portion does not exist , and all the ...
Page 10
... direction of a ray of light is changed by reflexions or refractions , the angle through which the original ray produced must be turned in order to bring it into the position of the final ray , is called the deviation of the ray . The ...
... direction of a ray of light is changed by reflexions or refractions , the angle through which the original ray produced must be turned in order to bring it into the position of the final ray , is called the deviation of the ray . 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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