 | William Nicholson - 1809 - 684 страници
...of the same ray CF after it is refracted ; thus the angle LCF is the angle of deviation. A lem, is glass ground into such a form as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. A plano-convex, has one side... | |
 | Edward Augustus Kendall - 1811 - 516 страници
...one is seen by refraction through the water, the other by the rays after refraction at tb,e surface. A lens is a glass ground into such a form as to collect...disperse the rays of light which pass through it. , There an: various kinds of lenses, named according to their forms. A plano-convex lens has one side... | |
 | Sir Richard Phillips - 1811 - 196 страници
...refraction through the water, the other by the rays after refraction at the surface. 199. A lens \aa glass ground into such a. form as to collect or disperse the rays of light which pass through it. 200. There are various kinds of lenses, named according to their forms. 201. A plano-convex lens has... | |
 | John Millard - 1813 - 704 страници
...against a surface, and are sent back again from the surface, they are said to be reflected. A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. A planoconvex has one side... | |
 | Encyclopaedias, John Millard - 1813 - 712 страници
...against a surface, and are sent back* again from the surface, they are said to be reflected. A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. A planoconvex has one side... | |
 | Jeremiah Joyce - 1815 - 468 страници
...It represents a glass lens, of which there are several kinds. Charles. How do vou describe a lens ? Tutor. A lens is a glass ground into such a form as...names. They are represented here in one view, (Plate i. Fig. 7.) A is «uch a one as that in the last figure, and it is called a plano-convex, because one... | |
 | Visit - 1819 - 252 страници
...in its focus. For the different experiments in optics glasses are ground in a particular manner, so as to collect or disperse the rays of light which pass through them. These glasses are called lens, and are of difi'erent forms, as concave, convex, double concave,... | |
 | Alexander Jamleson - 1821 - 456 страници
...against a surface, and are sent back again from the surface, they are said to be reflected. A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These arc of different shapes, and from thence receive different names. A plano-convex has one side... | |
 | William Nicholson - 1821 - 406 страници
...of the same ray CF, after it is refracted ; thus the angle LCF is the angle of deviation. A lens, is glass ground into such a form as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. A plano-convex, has one side... | |
 | Luke Herbert - 1824 - 394 страници
...whose centre is the deepest sunk. The sections of these may be curves as various as the last. A lens is glass ground into such a form as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. A. plano-convex has one side... | |
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A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names. 
