A Treatise on Optics |
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Page 9
... converge after reflexion to a point equidistant from the surface with the point of con- vergence of the incident pencil , and on the opposite side of it , —the degree of convergence being unaltered . COR . 3. The direction of the ray QR ...
... converge after reflexion to a point equidistant from the surface with the point of con- vergence of the incident pencil , and on the opposite side of it , —the degree of convergence being unaltered . COR . 3. The direction of the ray QR ...
Page 27
... converge to the other focus after reflexion at the curve , and that rays diverg- ing from one focus of a hyperbola will after reflexion at the curve diverge from the other focus . A particular case of either of these , is a paraboloid ...
... converge to the other focus after reflexion at the curve , and that rays diverg- ing from one focus of a hyperbola will after reflexion at the curve diverge from the other focus . A particular case of either of these , is a paraboloid ...
Page 50
... converge to Q. R A -N COR . Since RQR ' RqR ' , the degree of divergence of the reflected pencil is the same as that of the incident pencil . 61. Other cases of oblique reflexion or refraction are not so simple as that of the preceding ...
... converge to Q. R A -N COR . Since RQR ' RqR ' , the degree of divergence of the reflected pencil is the same as that of the incident pencil . 61. Other cases of oblique reflexion or refraction are not so simple as that of the preceding ...
Page 51
... cuts QC , is called the Secondary Focus . Def . The plane QCA or plane of incidence of the axis of the pencil is called the Primary Plane . Hence a small oblique pencil after reflexion or refraction converges 4-2 SMALL OBLIQUE PENCILS . 51.
... cuts QC , is called the Secondary Focus . Def . The plane QCA or plane of incidence of the axis of the pencil is called the Primary Plane . Hence a small oblique pencil after reflexion or refraction converges 4-2 SMALL OBLIQUE PENCILS . 51.
Page 52
Stephen Parkinson. Hence a small oblique pencil after reflexion or refraction converges to or diverges from two straight lines , one in and the other perpendicular to the primary plane . 63. Remark . When the aberration of a direct ...
Stephen Parkinson. Hence a small oblique pencil after reflexion or refraction converges to or diverges from two straight lines , one in and the other perpendicular to the primary plane . 63. Remark . When the aberration of a direct ...
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Common terms and phrases
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.