# Thin Lens Equation: Computation for Focal Length

Jun 17th, 2015
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Equation 1. Thin Lens Equation: Computation for Focal Length 1/f=1/do+ 1/di Where f is the focal length, do is the object distance, and di is the image distance.

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Experiment 10:Laboratory ReportJesus Alfonso C. Catahay, O'neil D. Cerdena,Robelle L. Cordova, and Yonnalyn A. DalanginDepartment of Biological SciencesCollege of Science, University of Santo TomasEspaa, Manila PhilippinesAbstractI. IntroductionII. TheoryEquation 1. Thin Lens Equation: Computation for Focal LengthWhere f is the focal length, do is the object distance, and di is the image distanceEquation 2. Computation for the 1st Image DistanceWhere di1 is the 1st image distance, f1 is the focal length of the 1st lens, and do1 is the 1st object distanceEquation 3. Computation for 2nd Object Distance Where do2 is the 2nd object distance, and 75 cm is the distance of the light source/object to the 2nd lens, 40cm is the distance of the light source/object to the 1st lens and di1 is the 1st image distanceEquation 4. Computation for 2nd Image DistanceWhere di1 is the 1st image distance, f2 is the focal length of the 2nd lens, and do2 is the 2nd object distanceEquation 5. Computation for Chromatic and Spherical AbberationsWhere f is the focal length, P is the object distance, and Q is the image distanceEquation 6. Percent Error|Computed Value - Accepted Value| x 100Accepted ValueIII. MethodologyFigure 1.0 Experimental set up for Activity 1 In Activity 1, the focal length of the lens was measured. This was done by allowing the rays of the sun fall on the lens and a clear image is formed on the screen by moving a black

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