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Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis,

Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis, reflect thru the focal point. All light rays that come in thru the focal point, reflect out parallel. the Law of Reflection is always obeyed. Ch18.1 Mirrors Concave mirror

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Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis,

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  1. Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis, reflect thru the focal point. All light rays that come in thru the focal point, reflect out parallel. the Law of Reflection is always obeyed.

  2. Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis, reflect thru the focal point. All light rays that come in thru the focal point, reflect out parallel. the Law of Reflection is always obeyed. center of focal optical axis curvature point The center of curvature (radius of curvature) = twice the focal length C = 2f

  3. Equations: Lens/Mirror Equation: focal object image length distance distance - when di = (+)  real image - when di = (–)  virtual image

  4. Equations: Lens/Mirror Equation: focal object image length distance distance - when di = (+)  real image - when di = (–)  virtual image Magnification Eqns: image height object height - when hi is (+) image is upright - when hi is (–) image is inverted

  5. Ex1) Find the image of a 2 cm tall object placed 11 cm in front of a concave mirror with a focal length of 5 cm.

  6. Ex1) Find the image of a 2 cm tall object placed 11 cm in front of a concave mirror with a focal length of 5 cm. Real, Inverted, smaller

  7. Ex2) Find the image of a 1 cm tall object placed 5 cm in front of a concave mirror with a focal length of 3 cm.

  8. Ex2) Find the image of a 1 cm tall object placed 5 cm in front of a concave mirror with a focal length of 3 cm. Real, Inverted, larger - when object is: do > c then di smaller c > di > f - when object is: c > do > f then di larger Ch18 HW#1 1-4di > c

  9. Ch18 HW#1 1 – 4 1) Find the image of a 1 cm tall object placed 10 cm in front of a concave mirror with a focal length of 6 cm.

  10. Ch18 HW#1 1 – 4 1) Find the image of a 1 cm tall object placed 10 cm in front of a concave mirror with a focal length of 6 cm. Real, Inverted, larger

  11. Ch18 HW#1 1 – 4 2) Find the image of a 2 cm tall object placed 10 cm in front of a concave mirror with a focal length of 4 cm.

  12. Ch18 HW#1 1 – 4 2) Find the image of a 2 cm tall object placed 10 cm in front of a concave mirror with a focal length of 4 cm. Real, Inverted, smaller

  13. Ch18 HW#1 1 – 4 3) Find the image of a 2 cm tall object placed 60 cm in front of a concave mirror with a focal length of 30 cm.

  14. Ch18 HW#1 1 – 4 3) Find the image of a 2 cm tall object placed 60 cm in front of a concave mirror with a focal length of 30 cm. Real, inverted, same size

  15. Ch18 HW#1 1 – 4 4) Find the image of a 2 cm tall object placed 8 cm in front of a concave mirror with a focal length of 4 cm.

  16. Ch18 HW#1 1 – 4 4) Find the image of a 2 cm tall object placed 8 cm in front of a concave mirror with a focal length of 4 cm. Real, inverted, same size

  17. Ch18.1 cont Ex1) A 1cm tall object is placed 2cm in front of a concave mirror with a focal length of 4cm. Find the image.

  18. Ch18.1 cont Ex1) A 1cm tall object is placed 2cm in front of a concave mirror with a focal length of 4cm. Find the image. Virtual Upright Larger When the object is placed inside the focal length of a concave mirror, the image is larger and virtual.

  19. Ex2) A 0.5cm tall object is placed 2cm in front of a concave mirror with a center of curvature of 6cm. Find the image.

  20. Ex2) A 0.5cm tall object is placed 2cm in front of a concave mirror with a center of curvature of 6cm. Find the image. Virtual Upright Larger

  21. Plane Mirrors - focal length at infinity - always form virtual images - image is same height and distance behind mirror Ex3) A 2cm tall object is placed 3.5cm in front of a plane mirror. Find the image.

  22. Plane Mirrors - focal length at infinity - always form virtual images - image is same height and distance behind mirror Ex3) A 2cm tall object is placed 3.5cm in front of a plane mirror. Find the image. Virt,up,same Ch18 HW#2

  23. Ch18 HW#2 5 – 7 5. A 1cm tall object is placed 3cm in front of a concave mirror with a focal length of 5cm. Find the image.

  24. Ch18 HW#2 5 – 7 5. A 1cm tall object is placed 3cm in front of a concave mirror with a focal length of 5cm. Find the image. Virtual Upright Larger

  25. Ch18 HW#2 5 – 7 6. (Scaled 3:1) A 3cm tall object is placed 6cm in front of a concave mirror with a focal length of 18cm. Find the image.

  26. Ch18 HW#2 5 – 7 6. (Scaled 3:1) A 3cm tall object is placed 6cm in front of a concave mirror with a focal length of 18cm. Find the image. Virtual Upright Larger

  27. 7. A 2cm tall object is placed 5cm in front of a plane mirror. Find the image.

  28. 7. A 2cm tall object is placed 5cm in front of a plane mirror. Find the image. Virt,up,same

  29. Ch18.2 Convex Mirrors Ex1) A convex security mirror at ur local minimart catches u taking a 5-finger discount from the twinkies. If the mirror has a radius of curvature of 7m, u r 2 m tall, standing 5m in front of the mirror, find ur image.

  30. Ch18.2 Convex Mirrors Ex1) A convex security mirror at ur local minimart catches u taking a 5-finger discount from the twinkies. If the mirror has a radius of curvature of 7m, u r 2 m tall, standing 5m in front of the mirror, find ur image. Virtual Upright Smaller

  31. Ex2) A 2.5cm object is placed 4cm in front of a convex mirror with a focal length of -3cm. Find the image.

  32. Ex2) A 2.5cm object is placed 4cm in front of a convex mirror with a focal length of -3cm. Find the image. Virtual Upright Smaller Ch18 HW#3 8 – 10

  33. Ch18 HW#3 8 – 10 8. A 10cm object is placed 20cm in front of a convex mirror with a focal length of -15cm. Find the image. (Scaled 5:1)

  34. Ch18 HW#3 8 – 10 8. A 10cm object is placed 20cm in front of a convex mirror with a focal length of -15cm. Find the image. (Scaled 5:1) Virtual Upright Smaller

  35. 9. A 2.5cm object is placed 6cm in front of a convex mirror with a focal length of -2cm. Find the image.

  36. 9. A 2.5cm object is placed 6cm in front of a convex mirror with a focal length of -2cm. Find the image. Virtual Upright Smaller

  37. 10. A 2cm object is placed 4cm in front of a convex mirror with a focal length of -4cm. Find the image.

  38. 10. A 2cm object is placed 4cm in front of a convex mirror with a focal length of -4cm. Find the image. Virtual Upright Smaller

  39. Ch18 Mirror Constructions 1. Find the image of a 2cm tall object placed 7cm in front of a concave mirror with a focal length of 3 cm.

  40. 2. A 1.0cm tall object is placed 1.5cm in front of a concave mirror with a focal length of 3cm. Find the image.

  41. 2. A 1.0cm tall object is placed 1.5cm in front of a concave mirror with a focal length of 3cm. Find the image. Virtual Upright Larger

  42. 3. A 2cm tall object is placed 4.5cm in front of a plane mirror. Find the image.

  43. 3. A 2cm tall object is placed 4.5cm in front of a plane mirror. Find the image. Virt,up,same

  44. 4. Find the image of a 2cm tall object placed 10cm in front of a concave mirror with a focal length of 4 cm.

  45. 4. Find the image of a 2cm tall object placed 10cm in front of a concave mirror with a focal length of 4 cm. Real, Inverted, smaller

  46. 5. A 2.5cm object is placed 2cm in front of a convex mirror with a focal length of -3cm. Find the image.

  47. 5. A 2.5cm object is placed 2cm in front of a convex mirror with a focal length of -3cm. Find the image. Virtual Upright Smaller

  48. 6. Find the image of a 0.2cm light bulb placed 5cm in front of a concave mirror with a focal length of 5 cm.

  49. 6. Find the image of a 0.2cm light bulb placed 5cm in front of a concave mirror with a focal length of 5 cm. No image

  50. Lab18.1 Mirrors - due tomorrow

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