A Treatise on Optics |
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Page 3
... equal . 9. Law of Refraction . When a ray is refracted at the surface of a medium , ( i ) The incident and refracted rays lie in one and the same plane with the normal to the surface at the point of inci- dence and on opposite sides of ...
... equal . 9. Law of Refraction . When a ray is refracted at the surface of a medium , ( i ) The incident and refracted rays lie in one and the same plane with the normal to the surface at the point of inci- dence and on opposite sides of ...
Page 9
... equal to ( RQA each to each , RAq RAQ and RA is common to the two triangles ; .. Aq = AQ . Now QR is any ray of the incident pencil ; therefore the directions of all the rays of the reflected pencil ( produced backward ) pass through ...
... equal to ( RQA each to each , RAq RAQ and RA is common to the two triangles ; .. Aq = AQ . Now QR is any ray of the incident pencil ; therefore the directions of all the rays of the reflected pencil ( produced backward ) pass through ...
Page 10
... limiting posi- tion of q . R Q FT Let AQ = u , AF = v , lines being considered positive when measured from A in a direction contrary to that of the inci- dent light . Now RQA , RqA being equal to the angles of 10 CONJUGATE FOCI .
... limiting posi- tion of q . R Q FT Let AQ = u , AF = v , lines being considered positive when measured from A in a direction contrary to that of the inci- dent light . Now RQA , RqA being equal to the angles of 10 CONJUGATE FOCI .
Page 11
Stephen Parkinson. Now RQA , RqA being equal to the angles of incidence and refraction of the ray QR , sin RQA = μ . sin RqA ; AR RQ AR ; = μ · Rq ' : . Rq = μ . RQ . In the limit when R moves up to A , and to F , 9 AF : = μ . AQ , or v ...
Stephen Parkinson. Now RQA , RqA being equal to the angles of incidence and refraction of the ray QR , sin RQA = μ . sin RqA ; AR RQ AR ; = μ · Rq ' : . Rq = μ . RQ . In the limit when R moves up to A , and to F , 9 AF : = μ . AQ , or v ...
Page 11
... equal to SRQA each to each , RAQ and RA is common to the two triangles ; .. Aq = AQ . Now QR is any ray of the incident pencil ; therefore the directions of all the rays of the reflected pencil ( produced backward ) pass through the ...
... equal to SRQA each to each , RAQ and RA is common to the two triangles ; .. Aq = AQ . Now QR is any ray of the incident pencil ; therefore the directions of all the rays of the reflected pencil ( produced backward ) pass through the ...
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Common terms and phrases
aberration achromatism angle of incidence axis QA bright centre circle of least coincides colours concave conical surfaces convex lens cos² Crown 8vo cuts the axis deviation diameter direct pencil distance emergent equation excentrical eye-glass eye-piece Fcap field of view fixed lines focal length geometrical focus Hence illumination image formed incident directly incident pencil index of refraction intersection lenses luminous point magnifying power medium object object-glass parallel rays passes pencil of parallel pencil of rays pencil whose axis perpendicular plane surface point of incidence point q position primary plane principal focus principal plane prism radius rays incident reflected or refracted reflected pencil reflexion or refraction refracted rays refracting angle refracting surface refractive index shew small oblique pencil small pencil spectrum sphere spherical reflector spherical surface subtends supposed telescope thin lens v₁ v₂ αμ
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