 | Condict Walker Cutler - 1889 - 364 pages
...mirrors. Curved mirrors may be : Spheroidal. Parabolic. A. Spheroidal mirrors. The centre of curvature is the centre of the sphere of which the mirror forms a part. The princ ipal axis is the line drawn from the centre of curvature to the centre of the mirror. The... | |
 | Daniel Evan Jones - Heat - 1891 - 358 pages
...spherical mirror is a portion of a spherical reflecting surface. The centre of curvature of the mirror is the centre of the sphere of which the mirror forms a part. The radius of the sphere is called the radius of curvature of the mirror. Spherical mirrors may be... | |
 | Stephen Pople - Juvenile Nonfiction - 1987 - 390 pages
...hollow sphere. Several terms are used in connection with curved mirrors. The centre of curvature marks the centre of the sphere of which the mirror forms a part; the pole, the principal axis, the aperture, and the radius of curvature of a mirror are all illustrated... | |
 | 236 pages
...side of the mirror is away from the centre of curvature. Def. " The centre of curvature of a mirror is the centre of the sphere of which the mirror forms a part." "The centre of face of a mirror is the middle point of the surface of the mirror." " The principal... | |
 | 236 pages
...side of the mirror is away from the centre of curvature. Def. "The centre of curvature of a mirror is the centre of the sphere of which the mirror forms a part." " The centre of face of a mirror is the middle point of the surface of the mirror." "The principal... | |
 | Royal Society (Great Britain) - Mathematics - 1882 - 422 pages
...we call centering is accomplished by the three screws which attach the mirror to the cap, and causes the centre of the sphere of which the mirror forms a part to be at the centre of the object-glass. To test this point a tube 1 foot long is put on the collimator... | |
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The following definitions apply equally to concave and convex mirrors: The middle point of the mirror is called its vertex. The centre of the sphere, of which the mirror forms a part, is called the optical centre. 
