Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 70
Fig. 100. You find the focus hot GILBERT LIGHT EXPERIMENTS 67 length of the convexmirror. Do you findit to be 2 inches? There is no realfocus for a convexmirror because itspreads the light, butthe reflected rays ap-pear to come from apoint 2 inches behind … i jj ■ Fig. 102. How to arrange cork, needle, and match the focus (Fig. 104).Do you find a smallinverted picture innatural colors of thewindow and of thethings outside thewindow? Have a friendmove about near thewindow. Do you gethis picture? Fig. 101. You light a match with sunlight the mirror. An…
Light · Scientific recreations
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