Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 384
se of an incident convergent wave), and decreasesas the distance of the source from the mirror decreases, vanishing when itreaches the center of curvature. The light reflected from the sides of a cup containing coffee or milkplainly shows the caustic curve on the surface of the liquid. 428. Focal… … Fig. 2Z7. to each other. These are called focal lines. The origin of these lines isclearly seen if we consider the mirror MN (Fig. 237) to be part of a largermirror MNO, on the axis SB of which the source S lies. Constructing thereflected rays incident at different points of this mirror, it is…
Physics
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