1. Fig. 23-CO, p. 790

2. Fig. 23-1, p. 791

3. Fig. 23-2, p. 791

4. Fig. 23-3, p. 791

5. Fig. 23-4, p. 792

6. Fig. MCQ23-12, p. 817

7. Fig. P23-5, p. 818

8. Fig. 23-10, p. 795

9. Fig. 23-9, p. 794

10. Fig. 23-13a, p. 797

11. Fig. 23-13, p. 797

12. Fig. 23-11, p. 795

13. Fig. 23-13b, p. 797

14. Fig. 23-13c, p. 797

15. Fig. 23-14, p. 798

16. Fig. 23-18, p. 803

17. Atmospheric Refraction and Sun’s Position Light rays from the sun are bent as they pass into the atmosphere. It is a gradual bend because the light passes through layers of the atmosphere. –Each layer has a slightly different index of refraction. The Sun is seen to be above the horizon even after it has fallen below it. Section 23.5

18. Atmospheric Refraction and Mirages A mirage can be observed when the air above the ground is warmer than the air at higher elevations. The rays in path B are directed toward the ground and then bent by refraction. The observer sees both an upright and an inverted image. Section 23.5

19. Fig. 23-20b, p. 804

20. Fig. 23-21, p. 805 Lenses work by refracting light

21. Fig. 23-23, p. 806

22. Fig. 23-24, p. 807

23. Fig. 23-25, p. 807

24. Fig. 23-25a, p. 807

25. Fig. 23-25b, p. 807

26. Fig. 23-25c, p. 807

27. Fig. 23-26, p. 809

28. Fig. 23-26a, p. 809

29. Fig. 23-26b, p. 809

30. Fig. 23-27, p. 810

31. Fig. 23-27a, p. 810

32. Fig. 23-27b, p. 810

33. Fig. 23-31, p. 814

34. p. 815

39. p. 816

42. Fig. P23-36, p. 820