Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
OPTICS. 217 to any point of the reflect- Ffg. 21. or, as LN, the angle of in-cidence, HNL, will equalthe angle of reflection,FNL. If the lines parallel tothe axis be intersected bya line perpendicular to theaxis, then each of the par-allel lines plus its reflectedline, as HN plus NF, willequal each… … 393. Figure 22. —Formation of images by concave mir-rors -when the object is beyond the centre of curvature.— Let 1 be the centre of curvature and F the principal focus. The linesAl and Hi, drawn from the extremities of the object through the Fig. 23.
Physics · Astronomy
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
