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Announcements 3/12/12

Announcements 3/12/12. Prayer Exam 2 grading: goal is to have all grading done by Thursday morning. One student hasn’t taken exam yet (he’s been sick), so please don’t talk to others about exam unless you are certain they’ve taken it. Overboard. Reading Quiz.

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Announcements 3/12/12

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  1. Announcements 3/12/12 • Prayer • Exam 2 grading: goal is to have all grading done by Thursday morning. • One student hasn’t taken exam yet (he’s been sick), so please don’t talk to others about exam unless you are certain they’ve taken it. Overboard

  2. Reading Quiz • Which of the following situations did NOT have an ABCD matrix presented in the text • curved mirror • curved interface • narrow single slit • thin lens • window

  3. Review • ABCD matrix for free-space translations

  4. Situation 2 • Reflection from a flat mirror

  5. Situation 3 • Snell’s Law (refraction from a flat surface)

  6. Situation 4 • Snell’s Law (refraction from a curved surface)

  7. Situation 5 (almost done!) • Reflection from a curved mirror

  8. Worked problem • Thick lens (like problem P9.6, not assigned) what is new height/angle? air glass air R1 R2 d

  9. Situation 6 • Transmission through a thin lens

  10. ABCD matrices summary, operating on ray vector (y, q) Summary Straight line, distance d Reflection from flat mirror (not given on exam) Refraction at flat surface (Snell’s Law) Refraction at curved surface R = positive for convex; negative for concave Lens: R = + for curving away Mirror: R = + for concave Spherical mirror & Thin lens

  11. Reading Quiz • Imaging occurs when • y1 is independent of q1 • y1 is independent of q2 • y2 is independent of q1 • y2 is independent of q2 (y1, q1) = initial light rays (y2, q2) = final light rays, after e.g. a lens

  12. Image Formation

  13. Worked Problem: two rays going through thin lens

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