1. 24 Geometric Optics Water drop as a converging lens

2. Reflection at a Plane Surface Image and Object Rays diverging from one point P (object) recombine at point P’ by mirror or lens— an image formed.

3. Object & Image Distances 1.Object distance 2.Image distance 3.Real image 4.Virtual image 5.Magnification

4. Sign Rules s: The (real) object distance is positive. (The distance is negative for a virtual object.) s’: The image distance (s’) is positive for all real images and negative for virtual images. y and y’: Heights are positive if measured upward from the principal axis and negative if measured downward. m: Magnification is positive if the image is erect and negative when inverted. f: The focal length is positive for converging mirrors and lenses, and negative for diverging ones.

5. Reflection at a Spherical Surface Mirror Equation

6. Focal Point & Focal Length-Concave

7. Image Construction—Concave

8. Focal Point & Focal Length-Convex

9. Image Construction—Convex

10. Image Construction—Principal Rays

11. Image Construction—Practice

12. Refraction at a Spherical Surface

13. How Deep is the Pool?

14. Thin Lenses—Converging

15. Thin Lenses—Diverging

16. Thin-Lens Equations

17. Imaging thru Thin –Lens: Principal Rays http://www.mtholyoke.edu/~mpeterso/classes/phys301/geomopti/ lenses.html

18. Principal Rays: Practice

19. Summary: Reflection at a Plane Surface

20. Summary: Reflection at a Spherical Surface

21. Summary: Graphical Methods for Mirrors

22. Summary: Refraction at a Spherical Surface & Thin Lenses

23. Summary: Graphical Methods for Lenses

24. Example: The Eye’s Lens The least distance of distinct vision (LDDV): 25 cm ~ 10 in

25. Mirror/Lens Equation

26. Homework Ch24 Problems: : 1, 4, 5, 6, 13, 20, 29, and 32 Answers to multiple choice problems

27. quiz (1)Construct the images using principal rays for a converging lens and a convex mirror, respectively. (2)Find the locations of images using lens/mirror equation (f = +5 or -5 cm, s = 8 cm).

28. Test 3 Grade Distribution # of Students: 30 Average: 12.8=64%

29. Test 3 Grade Distribution # of Students: 21 Average: 11.7=59%