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3Part C: Convergent + Divergent LensesIn the final setup of our experiment, a divergent lens of focal length -.150m or -150mm iscombined with the convergent lens from Part 1. The same procedure and comparisonmethods from the previous two parts of the experiment are repeated.3.1Experimental DataTable 3.1My captionSetupdo(m)1do(m)di(m)1di(m)Focal lengthAvg. Focal Length±std dev.0.134±0.00310.2514±0.020.2753.64±0.010.131±0.000420.2813.56±0.010.2464.07±0.020.131±0.000430.3253.08±0.010.2224.50±0.020.132±0.000440.2044.90±0.020.422.38±0.010.137±0.000550.1915.2±0.030.4742.11±0.010.136±0.0005±0.0010.001Table 3.2My captionEffective focal length,using lens holder values50mm% errorFocal length from graph0.134±0.00318Focal length from average0.123±0.0031110
3.2Graphs associated with Part CFigure 5Lens 1 - 75mm combined with Divergent Lens - (-)150mm3.3Data analysisEffective focal length =11f1-1f2=110.075+10.150= 0.150m(11)3.4Conclusion to part CInterestingly, the calculated values were reasonably close to each other in value, but whencomparing to the actual value of the effective focal length, our resulting percent error wasquite large and our calculated error could not account for it. Possible factors of error canbe attributed to the space between the two lenses as well as human error when determiningpositions when the resulting image on the screen was sharpest.11