I really need some help with this lab. I would really appreciate your help. The lab is about mirrors and lenses.

This is the procedure followed for the lab

Part A' n ave Mirror Arrangement Object Image Object Image Image Distance Distance Height (cm) Height (cm) Orientation (cm) (cm) 6.70m 6.70m 2.10m -4.1cm Real and Projected Inverted back to object distance 13.4cm 13.4cm -2.1cm 0.2cm Real, Projected smaller, back to 2x inverted object distance Concave and converging: f is positive Convex and diverging: f is negative D1 is going to be negative when the D 0 is less then f Inverted image=negative height Part B:Converging Lens Arrangement Object Image Object Image Image Distance (cm) Distance Height (cm) Height (cm) Orientation (cm) 12cm 12cm 2.1cm -1.9cm Real,inverted image and object distance ~ the same 24cm 32.9cm 2.1cm -0.3cm Real, object at ~ inverted 2x image distance 7.6cm 32.9cm 2.1cm -8.7cm Real, Reformed Inverted image after moving lens toward the object Infinity 4.7 Real, Distant inverted objectMirror and Lens Equation i - i + i (7.1) f di do The sign of f is specic to each type of mirror or lens. For concave mirrors and converging lenses, f is positive. For convex mirrors and diverging lenses, f is negative. An image is said to be inverted if its orientation is opposite to that of the object. Otherwise it is said to be upright. The magnication of the image is given by equation 7.2. Magnication m = = (7.2) Real images actually have light passing through them focused by the mirror or lens form the source; otherwise the image is virtual. Review these topics from your textbook. ACCEPTED VALUES The accepted value for the focal length of a converging lens is the image distance when the object is very far away. This is the only accepted value needed in this lab. PROCEDURE For each part of the experiment, draw a graph with a horizontal line representing the optical axis perpendicular to the lens or mirror. Record the position of each component of the system in the data tables. The distance for any object, image, or focal point is always measured from the lens or mirror. PART A: CONCAVE MIRROR 1. Arrange the illuminated object and the concave mirror so that a clear image forms at the same position as the object. For this arrangement the image and object distances are the same. 2. Measure the object distance, image distance, object height, image height, and image orientation and record them in the data table for Part A. 3. Arrange the illuminated object, half-screen and concave mirror so that a real image is formed with the object distance approximately twice the image distance. 4. Measure the object distance, image distance, object height, image height, and image orientation and record them in the data table for Part A. PART B: CONVERGING LENS 5. Arrange the illuminated object, converging lens and screen so that a real image is formed with the object distance approximately equal to the image distance. 6. Measure the object distance, image distance, object height, image height, and image orientation and record them in the data table for Part B. 7. Arrange the object, lens, and screens so that the real image is formed with the object distance approximately twice the image distance (do a 2d,) . 8. Measure the object distance, image distance, object height, image height, and image orientation and record them in the data table for Part B. 9. Keeping the object and screen positions the same as in part 7, move the lens toward the object until an image is again formed on the screen. 10. Measure the object distance, image distance, object height, image height, and image orientation and record them in the data table for Part B. 11. Choose a distant object, such as a building far from the laboratory or a window in a separate wing of Gillet Hall, and form an image ofa distant object with the converging lens and the screen. The image distance is equal to the focal length of the lens, because a very distant object is produced by rays that are essentially parallel. 12. Measure the image distance and image orientation, and record them in the data table for Part B. PART C: DIVERGING LENS 13. Adjust the illuminated object, screen, and converging lens so that an image is formed on the screen approximately 30 cm from the lens. Place the diverging lens between the converging lens and the screen, and place a mirror in front of the screen. Move the diverging lens until an image forms at the position of the object. 14. Measure the distance from the diverging lens to the screen as the focal length in the data table for Part C. Part C: Diverging Lens Arrangement Focal Length -39.1 diverging lens between converging lens and screen, image reflected off a mirror onto the plane of the object1. Calculate the focal length of the concave mirror twice, using the data from the two rows of the data table for part A. 2. Calculate the magnification of the concave mirror for each object distance analyzed. 3. Calculate the focal length of the converging lens three times, using the data from the first three rows of the data table for part B. 4. Use the image distance for a distant object as the accepted value for the focal length of a converging lens. Calculate the % error for the focal lengths you obtained in step 3. 5. Report the focal length of the diverging lens