1. Curved Mirrors

2. Reflection Characteristics Attitude Type Inverted Upright Size Real Virtual Laterally Inverted Same Enlarged Reduced

3. Type Real - image appears in front of the mirror (could be projected onto a screen) Virtual - image appears behind the mirror

4. Size a) Enlarged - image is larger than the object b) Reduced - image is smaller than the object c) Same - image is the same size as the object a) b) c)

5. Attitude a) Upright- image is right-side up b) Inverted- image is upside-down c) Laterally Inverted- image is flipped horizontally a) MIRROR b) MIRROR MIRROR c) MIRROR

6. Curved Mirrors Concave Convex “converging” mirror “diverging” mirror

7. Concave Mirrors

8. Concave Mirrors

9. f Terminology Focal Point (F) - where the light rays meet Vertex - the middle point of a curved mirror Focal Length (f) - the distance from the focal point to the vertex vertex principal axis

10. Concave Mirror Ray Diagrams Ray 1 - travels parallel to the principal axis and reflects through the focal point (F)

11. Concave Mirror Ray Diagrams Ray 2 - travels through the focal point and reflects parallel to the principal axis

12. Concave Mirror Ray Diagrams The point where the two reflected rays converge will be the location of the image

13. Concave Mirror Reflections 4 Cases Object is greater than 2 focal lengths from the mirror (do>2f) Object is between 1 and 2 focal lengths from the mirror (f<do<2f) Object is at the focal point (do=f) Object is between the mirror and the focal point (0<do<f)

14. Case 1: Reduced Inverted Real

15. Case 2: Enlarged Inverted Real

16. Case 3: No Image Formed!

17. Case 4: Enlarged Upright Virtual

18. Handout p.429 “Drawing Ray Diagrams for Concave and Convex Mirrors”

19. Convex Mirrors

20. Curved Mirrors Concave Convex “converging” mirror “diverging” mirror

21. Convex Mirrors Surface of mirror is curved outward Spreads out light rays (“diverging” mirror) Produces a virtual image that is upright and smaller than the object

22. Convex Mirrors

23. Convex Mirrors

24. Ray Diagrams for Convex Mirrors Ray 1: travels parallel to the principal axis and reflects through the focal point

25. Ray Diagrams for Convex Mirrors Ray 2: travels towards the focal point and reflects parallel to the principal axis

26. Ray Diagrams for Convex Mirrors The image appears where the (virtual) reflected rays appear to intersect

27. Remember: The image for a convex mirror is always virtual, upright and smaller!

28. Try it!