Inside Out Library · Explore

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)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 240

An illustration from 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, leaf 240
om the lens,the image, HN, will move toivard the lens and become smaller. The image, however, can never approach nearer to the lens than theprincipal focus, as this is the focus for parallel rays, in which case theobject would be at an infinite distance. The linear magnitude of the image, as… … XH, and the eye, be placed nearer to the lens than the principal foci,FF, the image, AB, will increase, will be erect and virtual. 234 OPTICS. The image being virtual can only be seen by looking through thelens; while, in the former cases, the images, being real, would be seenon an intercepted…

Physics · Astronomy

Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.

More pictures from 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

More like this