Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 65
Eays already convcrtrinu-, brousrht-together at a point nearer thanthe principal focus ; and rays diverginijc from a point within the prin-cipal focus, still diverging, though in a diminished degree. rays be diverging from a distant point, their focus will be moredistant from the lens than its… … Eays diverging from points more distant than the principal focuson either side, brought to a focus beyond it; if the point of divergencebe within the circle of curvature, the focus of convergence wiU bebeyond it; and vice versa. EEFKACTION BY CONVEX AND CONCAVE LENSES. 43 further the point from…
Microscopy
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