Contributions

  • B. K. P. Scaife (Editor) - Contributor

Publication

2001-02-15 - Cambridge University Press

Language

English

Word Count

225,000 words, Guess

Page Count

900 pages

Physical Format

Hardcover

Identifiers

First Sentence

110. If the aberrations be measured from a focus, at which the radius of curvature of the caustic vanishes, the expression (M)" for the aberrations, or rather for their first terms, vanish also, and the convergence is much more accurate than at other points of the caustics; on which account we may call these foci the principal foci and the corresponding rays the axes of the system.

Subjects

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