1. Light: Geometric Optics Chapter 23

2. 23-1 Ray Model of Light Light travels in a straight line so a ray model is used to show what is happening to the light This model assumes light to travel in a straight line and is represented by narrow lines called light rays

3. 23-2 Reflection from a Plane Mirror The Angle of reflection equals the angle of incidence

4. Diffuse reflection When light is incident upon a rough surface, microscopically rough

5. Image The image is what is seen in the mirror

7. Virtual image Real image

8. 23-3 Formation of Images by Spherical Mirrors Convex – reflects from the outside of the sphere, rearview mirrors Concave – reflects from the inside of the sphere, cosmetic mirrors

9. Focal Point & Focal Length

10. Image Formation-Ray Diagrams

11. Mirror Equation & Magnification

12. Mirror Equation Where d o is the object distance d i is the image distance f is the focal length

13. Magnification Equation Where m is the magnification h o is the object height h i is the image height d o is the object distance d i is the image distance

14. Sign gives the correct location and orientations of the image If h i + then upright, - inverted If d i or d o + then in front of mirror, - behind mirror

15. Objects closer to concave mirror

16. Convex Mirror Focal point behind the mirror Focal length is negative