Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 382
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 … Fig. 273. paper the size and kind of image. Advance the flame toward the lens,regulating at the same time the distance between the lens and wall, so asto preserve a distinctness of image. (2) Note the changes which the 364 ETHER DYNAMICS. image undergoes. (3) When the image and the flame become of…
Physics
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
