Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 264
th the cylinder. Pricka pin-hole in the cardboard on a line with the centre of theflame of the candle, and place in front of the hole and at adistance of three or four inches from it, a sheet of letter paper. 1. What is projected on the card ? 2. How is it formed, and why is it inverted ? NATURE… … Fig. 199. (b) That the light which passes from any one of these luminouspoints A, or B (Fig. 199) through the pin-hole travels in a straightline from the point to the hole, and continues to travel in thesame direction after passing through the hole. (c) That when a ray of light falls upon a screen…
Physics
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