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A) Reflection:

q i. q r. q 1. n 1. n 2. q 2. A) Reflection:. q i = q r. Flat Mirror: image equidistant behind. Spherical Mirrors: Concave or Convex. B) Refraction:. n 1 sin( q 1 )= n 2 sin( q 2 ). Flat Lens: Window Spherical Lenses: Concave or Convex. C) Absorption:. glass. silver.

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A) Reflection:

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  1. qi qr q1 n1 n2 q2 A) Reflection: qi = qr Flat Mirror: image equidistant behind Spherical Mirrors: Concave or Convex B) Refraction: n1 sin(q1)= n2 sin(q2) Flat Lens: Window Spherical Lenses: Concave or Convex C) Absorption:

  2. glass silver Mirrors are backed by a very thin layer of metal which reflects the light. paint

  3. Mirrors produce an upright, virtual image that is laterally inverted Upright Lateral Inversion Virtual Cannot be projected onto a screen.

  4. measured fromthe normal A line  to the surface at the point of incidence i= r Law of reflection Reflection i = incident angle r = reflected angle

  5. or Millions of light rays reflect from objects and enter our eyes – that’s how we see them! When we study the formation of images, we will isolate just a few useful rays:

  6. Ex: glossy vs. flat paint

  7. Image Image in a Plane Mirror Mirror Object

  8. How tall a mirror do you need to be able to see your entire body? Does it matter how far away from the mirror you stand?

  9. Multiple Reflections ( 2 or more mirrors) image object image image

  10. B JOE Book C A D Mirror Joe sees the image of a book as shown from above. Where does Joe see the image. (Joe would see the object as being at the image point if he didn’t know that the mirror existed.) • A • B • C • D • None of the above

  11. JOE moves above Physics Book Moves toward mirror A Mirror Joe sees an image which is on a dotted line through the book and perpendicular to the mirror, as shown. Then, Joe moves sideways as shown by the brown arrow. Compared to its original location, the image that he sees • Doesn’t move • Is at the same distance from the mirror but above the dotted line • At the same distance but below the dotted line • On the dotted line but moves toward the mirror • On the dotted line but moves away from the mirror.

  12. The mirror in the following figure deflects a horizontal laser beam by 60o. What is the angle Φ? • 20o • 30o • 40o • 45o

  13. θ A laser beam is incident on the left mirror in the following figure. If I want the reflected beam to be always parallel to the incident beam regardless of the direction of the incident beam, what should the angle θ be? • 45o • 60o • 90o • 120o

  14. Now if θ is 80o, what is the angle Φ of the reflected laser beam? • 15o • 30o • 45o • 20o

  15. Pool Table Problem Bank the ball off the top rail into pocket A A

  16. Pool Table Problem Bank the ball off side and top rail into pocket A A

  17. A* mirror Pool Table Problem A

  18. A*** A* mirror A** mirror Pool Table Problem A

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