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phy124:lab_7 [2010/03/31 22:33]
mdawber
phy124:lab_7 [2010/04/03 11:58] (current)
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====== PHY124 Lab 7 - Reflection, Refraction and Images ====== ====== PHY124 Lab 7 - Reflection, Refraction and Images ======

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If you need the .pdf version of these instructions you can get them [[http://​www.ic.sunysb.edu/​Class/​phy122ps/​labs/​dokuwiki/​pdfs/​phy124lab7.pdf|here]]. If you need the .pdf version of these instructions you can get them [[http://​www.ic.sunysb.edu/​Class/​phy122ps/​labs/​dokuwiki/​pdfs/​phy124lab7.pdf|here]].
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===== Video ===== ===== Video =====
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Compare your obtained value of f with the nominal value of 5 cm, is it consistent? Compare your obtained value of f with the nominal value of 5 cm, is it consistent?

-Find the magnification from the measured heights of the image and object using \$m=h_{o}/h_{i}\$.+Find the magnification from the measured heights of the image and object using \$m=h_{i}/h_{o}\$.

Calculate the error in the measured magnification from the errors in \$h_{i}\$ and \$h_{o}\$ using equation (E.7) in Error and Uncertainty.  ​ Calculate the error in the measured magnification from the errors in \$h_{i}\$ and \$h_{o}\$ using equation (E.7) in Error and Uncertainty.  ​
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Move the lens to another position, closer to the screen, where you get a sharp image of a different size. Record the same data for that position. No errors are needed here. Move the lens to another position, closer to the screen, where you get a sharp image of a different size. Record the same data for that position. No errors are needed here.

-On the graph paper on your worksheet make a drawing – to scale as before – containing object and image arrows and the lens with object and image distance and the nominal focal length of 5 cm. Reconstruct in your drawing the image with the two principal rays (see Ch22 sheet 20). Get the measured magnification \$m=h_{o}/h_{i}\$  and compare it to the value obtained for your 1st lens position. ​+On the graph paper on your worksheet make a drawing – to scale as before – containing object and image arrows and the lens with object and image distance and the nominal focal length of 5 cm. Reconstruct in your drawing the image with the two principal rays (see Ch22 sheet 20). Get the measured magnification \$m=h_{i}/h_{o}\$  and compare it to the value obtained for your 1st lens position. ​

=== Image and Magnification for the 10 cm Diverging Lens: Qualitative only === === Image and Magnification for the 10 cm Diverging Lens: Qualitative only ===