A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 31–ի 1-ից 5-ը:
Էջ 11
... Hence it follows , that the image a ob being , as it were , a new object placed before the mirror B 0 , will have an image a oa of itself formed behind в o ; and for the same reason the image B O a will have an image boẞ of itself ...
... Hence it follows , that the image a ob being , as it were , a new object placed before the mirror B 0 , will have an image a oa of itself formed behind в o ; and for the same reason the image B O a will have an image boẞ of itself ...
Էջ 12
... Hence it is manifest , that the last sector , a o ß , is not , as Mr. Harris supposes , a reflexion from either of the two last images , boß , ao a , but is composed of the images of two half sectors , one of which is formed by the ...
... Hence it is manifest , that the last sector , a o ß , is not , as Mr. Harris supposes , a reflexion from either of the two last images , boß , ao a , but is composed of the images of two half sectors , one of which is formed by the ...
Էջ 14
... Hence it follows , 1. That when A O B is ,,,, etc. , of a circle , the number of reflected images of any object is 3-1 , 5—1 , 7-1 , etc. , and , 5-1 27 27 2 2. That the number of images which reach the eye from each mirror is 3-1 7 ...
... Hence it follows , 1. That when A O B is ,,,, etc. , of a circle , the number of reflected images of any object is 3-1 , 5—1 , 7-1 , etc. , and , 5-1 27 27 2 2. That the number of images which reach the eye from each mirror is 3-1 7 ...
Էջ 19
... Hence it is manifest , that neither the principles nor the effects of the Kaleidoscope could possibly be deduced from any practical knowledge respecting the luminous sectors . In order to explain the formation of the symmetrical picture ...
... Hence it is manifest , that neither the principles nor the effects of the Kaleidoscope could possibly be deduced from any practical knowledge respecting the luminous sectors . In order to explain the formation of the symmetrical picture ...
Էջ 20
... Hence , o o = v p will form similar to t q , and similarly The figure m n o p q t , there- object , and several reflected o z does , and is o q , and o y one straight line , equal and situated with respect to B 0 . fore , composed of ...
... Hence , o o = v p will form similar to t q , and similarly The figure m n o p q t , there- object , and several reflected o z does , and is o q , and o y one straight line , equal and situated with respect to B 0 . fore , composed of ...
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Common terms and phrases
A O E angle A O B angles of incidence angular aperture angular point apparent magnitude arranged beautiful brass rim catoptrics cell CHAPTER circle circular field coloured glass combination composed cone constructed convex lens DAVID BREWSTER direct vision distance effects produced equal exhibited Fcap figure fixed focal length half History images formed inches inclination Indigo instrument intensity inverted image JOHN WILSON CROKER Kaleido Kaleidoscope last sector lens light looking-glass LORD manner motion move number of reflexions number of sectors object placed object-box object-plate observer odd aliquot optical pair pattern pieces plane mirrors plates of glass Portrait position Post 8vo principles re-entering angles reflected images reflectors ring salient angles screw Second Edition sector A O B seen by direct shown in Fig side similarly situated speculum metal surface symmetrical picture symmetrically related Third Edition tion tube velocity Vols Woodcuts
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Էջ 1 - Medal, the reflectors were in some cases inclined to each other, and he had occasion to remark the circular arrangement of the images of a candle round a centre, or the multiplication of the sectors formed by the extremities of the glass plates. In repeating, at a subsequent period, the experiments of M. Biot on the action of fluids upon light, Dr B.