physics2thinlenses - Experiment 22 Thin Lenses Rachel Hill...

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Experiment 22: Thin LensesRachel HillDeependra Shah20 April 2016Kristen Pennington
RESULTS/GRAPHS:Part 1:Converging LensMethod I:O4.1 cmL33.9 cmi71.5 cmdo29.8 cmdi37.6 cmf16.61 cmMethod II:f: 16.5 cmThe image is diminished, reversed, and inverted.Comparison: The two measurements are almost the exact same.% difference: (16.61-16.5) / [(16.61+16.50/2] * 100 = 0.664% differencePart 2: Diverging LensConverging LensO4.1 cmL47.4 cmi75.8 cmdo43.3 cmdi28.4 cmDiverging LensL65.2 cmO75.8 cmi85.2 cmdo-10.6 cmdi20 cmf-22.55 cmCompare f of a Diverging Lens
(10.6)(20) / (10.6-20) = -22.55 cmThe f’s are identical.
Part 3: Lateral Magnification, Mhi2.6 cmho3.6 cmM (hi/ho)0.72 cmM (verification equation)-0.781 cmO4.1 cmL42.5 cmi72.5 cmdo38.4 cmdi30 cmf16.84 cmhi12.9 cmho3.6 cmM (hi/ho)3.58 cmM (verification equation)-3.48 cmdo21.6 cmdi75.1 cmf16.78 cmdo= f f = 16.78 = do= 16.78di= infinity because an image did not appear (1/16.78)-(1/16.78) = 0CONCLUSION:The main objective of experiment 22 was to measure the focal lengths of a converging lens and a diverging lens and investigate magnification. The theory that the experiment was based off of was that light refracts when passing through media with different indices of refraction. The first type of lens that was used was a converging lens. A converging lens is thicker in the center than it is at the edges, so it can also be
considered a convex lens. It is a lens that forms real images and can be used for focus parallel light rays. The lens forms the real image when light travels from the air to the glass and back to the air. The image is formed because light actual passes through the

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