Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 279
the lightwhich falls upon it. 2. What is the distance of the lens from the paper when theilluminated area is the smallest possible. The point where the suns rays meet after passingthrough a lens is called the focus of the lens, and tbedistance between the focus and the centre of the lens iscalled… … Fig. 217. REFRACTION AND DISPERSION OF LIGHT. 271 Place the candle at more than twice the focal distance fromthe lens. Move the screen backward or forward until asharply defined image of the candle is formed on it. 1. Is the image larger or smaller than the candle ? Is there anyrelation between the…
Physics
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