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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 ===== | ||
| + | <flashplayer width=640 height=480>file=http://www.ic.sunysb.edu/Class/phy122ps/labs/phy122vid/phy124lab7.flv</flashplayer> | ||
| ===== Part I ===== | ===== Part I ===== | ||
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| * Triangular prism | * Triangular prism | ||
| - | {{124l7fig1.jpg}} Fig1 | + | {{124l7fig1.jpg}} |
| + | \\ Fig1 | ||
| ==== The laws of reflection and refraction ==== | ==== The laws of reflection and refraction ==== | ||
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| {{124l7fig4.jpg}} | {{124l7fig4.jpg}} | ||
| - | \\Fig4 | + | \\ Fig4 |
| ==== The imaging law for lenses ==== | ==== The imaging law for lenses ==== | ||
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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 hi and ho 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. |
| Calculate the magnification from the measured image and object distances using equation (7.4). | Calculate the magnification from the measured image and object distances using equation (7.4). | ||
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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 === | ||
