Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 523
ere are only virtualfoci. Let SI, TK . . . dig. 466) be rays jiarallcl to the principal axis of aconvex mirror. These rays, after reflection, take the ili\crging directionsIM, KH, which, when continued, meet in a point I, which is ihcprincipal 527] Determination of tJie Principal Focus of a Mirror.… … Fig. 4C6. If the incident luminous rays, instead of being parallel to the axis, pro-ceed from a point L, situated on the axis at a finite distance, it is at onceseen that a virtual focus will be formed at a point /, between the principalfocus F and the mirror. 527. determination of tbe principal…
Physics
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