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)
se few rays, being sensibly parallel,will be converged, and form, on the retina, notonly a distinct but an enlarged image. Thebrightness of the image will be diminished, owingto the pin-hole being smaller than the pupil. 454 Figure 12.—Brilliancy of vision is dependent on thenumber of rays that…
Physics · Astronomy
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