PHYS 101 1st Edition Lecture 30Outline of Last Lecture I. Recap of Equations on Exam II. Practice Exam ProblemsOutline of Current Lecture III. Mirrors Current Lecture III. Mirrors A. Three types: flat (shiny, dark back), concave (for make-up & dentist&…), and convex (shoplifting, rear mirror of a car). B. P: from object to mirror, q: from image to mirror, in flat mirror: p = q H0=Hi for flat mirror (same size) C. Magnification: M = hi/h0 = h0/h0 = 1 (same size) M < 1 image is small (shoplifting)M > 1 image is large (make-up) D. For all mirrors & lenses: (1/p) + (1/q) = (1/f) ; where f = focal length E. What is the focal length of a flat mirror? Answer: (1+p) + (1/q) = (1/f) , but p = q for a flat mirror (1+q) + (1+q) = (1/f) , but q is on the other side, so it is negative. (1/p) + (1/q) = (1/f) (1/q) + (1/-q) = (1/f) (1/q) – (1/q) = (1/f) These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.0 = 1/f f = 1/0 =
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