Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 321
ha thin cloud which shuts off some of its light, persons areoften surprised to find that it appears smaller than theyhad imagined. 280. Shadows.—In Fig. 197 let L represent a point oflight, cd an opaque object, and ef a screen. It is manifestthat no light from L will pass into the region c d ef.…
Physics
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