A Treatise on Optics |
From inside the book
Results 1-5 of 45
Page 5
... obtained independently of reflexion . Of the law of refraction we shall speak hereafter when we come to explain the mode of determining the refractive indices of different substances . The law of reflexion seems to have been known in ...
... obtained independently of reflexion . Of the law of refraction we shall speak hereafter when we come to explain the mode of determining the refractive indices of different substances . The law of reflexion seems to have been known in ...
Page 14
... obtained independently ; thus , suppose a ray Q'R incident parallel to the axis QA to be reflected in direction Rq ' ( these lines QR , Rq ' are not drawn in the figure ) , then in the two triangles Qq'R , Rq'q , we have < q'Rq = ↳ QRQ ...
... obtained independently ; thus , suppose a ray Q'R incident parallel to the axis QA to be reflected in direction Rq ' ( these lines QR , Rq ' are not drawn in the figure ) , then in the two triangles Qq'R , Rq'q , we have < q'Rq = ↳ QRQ ...
Page 20
... obtained by making u∞ , and we get = μ v = .7 . μ 1 COR . 2. To compare the degree of divergence of the pencil after and before refraction we must take the limit of the ratio RqA : RQA when R approaches A ; this ratio = sin RqA sin RQA ...
... obtained by making u∞ , and we get = μ v = .7 . μ 1 COR . 2. To compare the degree of divergence of the pencil after and before refraction we must take the limit of the ratio RqA : RQA when R approaches A ; this ratio = sin RqA sin RQA ...
Page 25
... obtain a third image , formed by rays reflected at A , B , and again at A , and so on . Thus we get a set of images formed by rays first reflected at A , then at B , again at A , and so on in succession . 3 In like manner we should get ...
... obtain a third image , formed by rays reflected at A , B , and again at A , and so on . Thus we get a set of images formed by rays first reflected at A , then at B , again at A , and so on in succession . 3 In like manner we should get ...
Page 29
... obtain for the forms of the generating curves SP + HP = C , and SP - HP = C respectively , by proceeding in a manner similar to the above . These results can of course be obtained independently by direct investigation . They represent ...
... obtain for the forms of the generating curves SP + HP = C , and SP - HP = C respectively , by proceeding in a manner similar to the above . These results can of course be obtained independently by direct investigation . They represent ...
Other editions - View all
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
Popular passages
Page 299 - CAMPBELL : — THE NATURE OF THE ATONEMENT AND ITS RELATION TO REMISSION OF SINS AND ETERNAL LIFE. Fourth and Cheaper Edition, crown 8vo. 6s. "Among the first theological treatises of this generation.
Page 300 - AN ELEMENTARY TREATISE ON THE LUNAR THEORY, with a Brief Sketch of the Problem up to the time of Newton. Second Edition, revised. Crown 8vo. cloth. 5*. 6d. Hemming. — AN ELEMENTARY TREATISE ON THE DIFFERENTIAL AND INTEGRAL CALCULUS, for the Use; of Colleges and Schools.
Page 300 - FROST.— The First Three Sections of Newton's Principia. With Notes and Problems in illustration of the subject. By PERCIVAL FROST, MA late Fellow of St. John's College, Cambridge, and Mathematical Lecturer of Jesus College. Crown 8vo. cloth, 10s.
Page 302 - Crown 8vo. 7s. 6d. HOWARD. — The Pentateuch ; Or, the Five Books of Moses. Translated into English from the Version of the LXX. With Notes on its Omissions and Insertions, and also on the Passages in which it differs from the Authorized Version. By the Hon. HENRY HOWARD, DD Crown 8vo. GENESIS, One Volume, 8s. 6d. ; EXODUS AND LEVITICUS, One Volume, 10s. 6d. ; NUMBERS AND DEUTERONOMY, One Volume, 10s. 6d. HOZIER. — The Seven Weeks' War ; Its Antecedents and its Incidents.