Austin, Louis W. (Louis Winslow), 1867-1932, Thwing, Charles B. (Charles Burton), 1860-1946, joint author · Boston, Allyn and Bacon · leaf 119
6 PHYSICAL MEASUHEMENT. object, <\ Fig. 54, near a screen, s, and at one edge of it.Hold behind the lens a plane mirror, and move lens andmirror together parallel to the screen until a sharp imageof the candle appears on the screen. The distance of theimage from the centre of the lens is the… … Fig. 54. (<?) Third method. Place the object at any convenientdistance from the lens, and move the screen until a sharpimage is found. Mark the position of the lens, and, withoutmoving screen or object, move the lens till a second positionis found, where a sharp image is obtained. If a be…
Physics
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