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Thin Lenses Lab ReportBy: Luke Holder4/20/20
Abstract: The objective of this experiment was to measure the focal lengths of both a thin convex lens and a thin concave lens. While measuring the focal lengths we also observed the characteristics of each lens. The primary equipmentused in this experiment includes a bi-convex lens, a bi-concave lens, and a cross-haired light source. The primary results show the focal lengthof the positive convex lens to be around 14 cm, while the negative diverting lens had a focal point around -133 cm. Uncertainty was calculated for the positive lens and could be due to a faulty lens or lighting source. Results: Positive Lens:Trial NumberObject DistanceImage LocationImage DistanceSize of ImageFocal Length1165 cm180 cm15 cm1 cm15 cm2105 cm121 cm16 cm1.5 cm13.9 cm390 cm106.1 cm16.1 cm1.9 cm13.7 cm460 cm78 cm18 cm3 cm13.9 cm522.5 cm58 cm35.5 cm15.9 cm13.8 cm628 cm55 cm27 cm10 cm13.8 cmFavg: (13.9+13.7+13.9+13.8+13.8)/5 = 13.8 cmUncertainty: (13.9-13.7)/2 = 0.1 cm