Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 119
e paththrough which the body leaves the surface is the line ofreflection, and the angle between the perpendicular andthat line is the angle of reflection, DBC. II. The angles of Incidence and Reflection are in the sameplane perpendicular to the surface at the point where reflec-tion occurs. The… … 110 ACOUSTICS.
Physics
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