Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 33
30 GILBERT BOY ENGINEERING … Fig. 47. The beams are in the same plane perpendicular to themirror opposite thespot where the lightstrikes the mirror (Fig.46). Do you find thatthe angle between thereflected beam and theruler is equal to theangle between the in-cident beam and theruler? Hold a sheet ofcardboard edge-wise to the…
Light · Scientific recreations
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