Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 164
five plano-convex lenses in it and these not only magnify the image butthey also erect it so that you see the object as it really is. While the homemade telescopes which I have described willnot magnify as highly as a cheap telescope which you can buy,yet you ought to make one, for it will let you… … A 8 Fig. 157.—Magnifying Power op Telescope. To Find the Power of a Telescope.—In the last chapter, Iexplained what the focal length of a convex lens is, see Fig. 146,and how to measure it. To repeat, it is the distance in inchesbetween the center of a lens and the point where the rays…
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
