OF LIGHT. 35 EXPERIMENT (6). To find by experiment the position of theimtge of a point seen by reflexion in a plane mirror. Set up the plane mirror1 as before on the drawing-board.Let A£, fig. 19, be its trace. Place an upright pin in the board at L, and a series ofpins J/j, M^, etc. at intervals… … Join LMu L3f2, etc., thus drawing a series of incident rays.Look obliquely at the glass, moving the head until thereflexion of the pin L is seen in a straight line behind M^ andplace another pin N^ in the board to cover these two, so thatA\, Ml and the reflexion of L are in one line, then M^N-i…
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