Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 382
rays meet. The negative sign refers to the direction in which p is measured. Conjugatefoci of diverging lenses are on the same side of the lens. IMAGES FORMED. 363 But if the screen be placed at S or S, it is evident that a blurred imagewill be formed. Instead of moving the screen back and forth,… … Fig. 272. Place the lens at a distance from a white wall about equal to its focallength. Place a candle flame (better the flame of a flsh-tail burner) atsuch a distance the other side of the lens that it will produce a distinctand well-defined image on the wall (Pig. 273). (1) Observe and note on
Physics
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