Experimentally determine the relationship between the index of refraction and the radius of curvature for a constant focal length. Ensure that the ruler is still present in the simulation. Choose a radius of curvature other than the default value. Change the index of refraction by some small increment. Observe the change in the position of the focal point. Use the slider bar to change the radius of curvature to bring the focal point back to its original position. Record both the index of refraction and the radius of curvature in your laboratory notebook. Repeat the process of changing both the index of refraction and the radius of curvature to obtain at least 10 data points. Plot your data on a scatter plot using your favorite spreadsheet program. What is the shape of this curve?