1. Textbook sections 26-3 & 26-4 Physics 1161: Lecture 21 Curved Mirrors

2. R f 1) 2) 3) p.a. Preflight 21.1 Which ray is NOT correct? 36% 45% 18%

3. R f 1) 2) 3) p.a. Preflight 21.1 Ray through center should reflect back on self. Which ray is NOT correct?

4. Preflight 21.3 The image produced by a concave mirror of a real object is: 1)Always Real 2)Always Virtual 3)Sometimes Real, Sometimes Virtual 39% 30%

5. Where in front of a concave mirror should you place an object so that the image is virtual? 1.Close to mirror 2.Far from mirror 3.Either close or far 4.Not Possible

6. Where in front of a concave mirror should you place an object so that the image is virtual? 1.Close to mirror 2.Far from mirror 3.Either close or far 4.Not Possible

7. Solving Equations A candle is placed 6 cm in front of a concave mirror with focal length f=2 cm. Determine the image location. R f p.a. Preflight 21.2 Compared to the candle, the image will be: Larger Smaller Same Size 29% 12% 59%

8. Solving Equations A candle is placed 6 cm in front of a concave mirror with focal length f=2 cm. Determine the image location. d i = + 3 cm (in front of mirror) Real Image! R f p.a. Preflight 21.2 Compared to the candle, the image will be: Larger Smaller Same Size

9. Physics 1161: Lecture 17, Slide 9 3 Cases for Concave Mirrors Inside F C F ObjectImage C F Object Image C F Object Image Between C&F Past C Inverted Enlarged Real Upright Enlarged Virtual Inverted Reduced Real

10. Solving Equations A candle is placed 6 cm in front of a convex mirror with focal length f=-3 cm. Determine the image location. Determine the magnification of the candle. If the candle is 9 cm tall, how tall does the image candle appear to be?

11. Solving Equations A candle is placed 6 cm in front of a convex mirror with focal length f=-3 cm. Determine the image location. Determine the magnification of the candle. If the candle is 9 cm tall, how tall does the image candle appear to be? m = + 1/3 h i = + 3 cm Image is Upright! d i = - 2 cm (behind mirror) Virtual Image! Diverging mirror!

12. Preflight 21.4 The image produced by a convex mirror of a real object is ? 1)Always real 2)Always virtual 3)Sometimes real and sometimes virtual 24% 61% 15%

13. Mirror Summary Angle of incidence = Angle of Reflection Principal Rays – Parallel to P.A.: Reflects through focus – Through focus: Reflects parallel to P.A. – Through center: Reflects back on self |f| = R/2