Principles

Procedure

Pre-lab WebHW

Data

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Procedure

Part 1:  Optical Bench Measurements

1. Adjust your setup until you have a focused image for the object distances given on your data page.
2. Measure s_i, and use s_o to compute f.
3. Measure the image size and object size, and use these values to compute M.
4. Compute M using measured values of s_i, and s_o, and compare to the result of step 3.
5. Record the orientation of the image.
6. Compute an average value of your three focal length values, and record.

Part 2:  Ray Diagrams

1. Using the average focal length computed in step 6 above, draw accurate ray diagrams for each of the three trials in Part 1.  You need not use the same scale for each part.  Record your scale clearly on each diagram.
2. From each ray diagram, determine actual values (using your scale) for s_i, s_o, and both values of M (s_i/s_o and h_i/h_o ). 
3. Compare image distance values to those obtained in Part 1 with a percent difference.