A Treatise on Optics |
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Page 17
... diverging from consecutive points of the object , and reflected at the surface . This geometrical image will rarely coincide with the visible image as seen by an eye in a given position . In a subsequent chapter we propose to give a ...
... diverging from consecutive points of the object , and reflected at the surface . This geometrical image will rarely coincide with the visible image as seen by an eye in a given position . In a subsequent chapter we propose to give a ...
Page 21
... so reflected from A and diverging from Q , will be incident on the second mirror B , and if we take BQ , = BQ1 , Q2 will be the focus of the rays after reflexion from B. The rays will then be incident upon A PARALLEL MIRRORS . 21.
... so reflected from A and diverging from Q , will be incident on the second mirror B , and if we take BQ , = BQ1 , Q2 will be the focus of the rays after reflexion from B. The rays will then be incident upon A PARALLEL MIRRORS . 21.
Page 22
... diverging from Q and incident on the second mirror B will have a geometrical focus or image in Q ' , where BQ = BQ ' ; the rays diverging from this point Q ' and incident on the first mirror A , will after reflexion at A diverge from a ...
... diverging from Q and incident on the second mirror B will have a geometrical focus or image in Q ' , where BQ = BQ ' ; the rays diverging from this point Q ' and incident on the first mirror A , will after reflexion at A diverge from a ...
Page 23
... diverging from Q and reflected at the mirror A , i . e . Q , is the image of Q form- ed by reflexion at A. Draw QQ 2 perpendicular to the second mirror B , then in like manner Q , is the image formed by rays reflected from B , after ...
... diverging from Q and reflected at the mirror A , i . e . Q , is the image of Q form- ed by reflexion at A. Draw QQ 2 perpendicular to the second mirror B , then in like manner Q , is the image formed by rays reflected from B , after ...
Page 26
... diverge from a point S ; to find a surface which will refract them accurately to another given point H. The surface will ... diverging from Sand refracted at P , Q accurately to the point H , in one plane passing through S , H , -μ the ...
... diverge from a point S ; to find a surface which will refract them accurately to another given point H. The surface will ... diverging from Sand refracted at P , Q accurately to the point H , in one plane passing through S , H , -μ the ...
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aberration achromatism angle of incidence axis QA bright centre circle of least cloth coincides colours concave converge convex lens cos² Crown 8vo cuts the axis determine deviation direct pencil distance emergent equation excentrical eye-glass eye-piece Fcap fixed lines focal length geometrical focus Hence illumination image formed incident directly incident pencil index of refraction intersection lenses luminous point magnifying power medium mirror object object-glass parallel rays passes pencil of light pencil of parallel pencil of rays pencil whose axis perpendicular plane surface point of incidence position primary plane principal focus principal plane prism radii radius rays incident reflected or refracted reflected pencil reflexion or refraction refracted rays refracting angle refracting surface refractive index retina shew small oblique pencil small pencil spectrum sphere spherical reflector spherical surface supposed telescope thin lens v₁ v₂ αμ аф
Popular passages
Page 305 - Eumenides. The Greek Text with English Notes, and an Introduction, containing an Analysis of Miiller's Dissertations.