Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 110
FIG. I. diagram to show course of the rays. is also the case with the millions of points form-ing the surface of the candle. This pinhole does not let enough light through,but if we make it larger so many rays comethrough from the same point as to blur theimage. To use a larger opening we need a… … FIG. 2. A MAGIC LANTERN SLICED DOWNTHROUGH THE CENTER. Fig. 2 shows a magic lantern as it would lookif it had been sliced down through the center,sothe path of the light rays can be shown. Thediverging rays from the incandescent lamp arecollected by the condensing lens and made paral-lel before…
Children's literature
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