lenses - Physics 113 Lecture 18 Lenses Todays Lecture will...

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Physics 102: Lecture 19, Slide 1 Today’s Lecture will cover textbook sections from Chapter 23 Physics 113: Lecture 18 Lenses Ciliary Muscles Physics 113 Dr. Renat Letfullin
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Physics 102: Lecture 19, Slide 2 Last Time: Physics 113 Dr. Renat Letfullin Lenses (continue) Flat Lens (Window) Converging Lens Diverging Lens Today: Diverging Lens Lens Equation Multiple Lenses
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Physics 102: Lecture 19, Slide 3 1) Rays parallel to principal axis pass through focal point. 2) Rays through center of lens are not refracted. 3) Rays through F emerge parallel to principal axis. Assumptions: • monochromatic light incident on a thin lens. • rays are all “near” the principal axis. Converging Lens Principal Rays F F Object P.A. Image is: real, inverted and enlarged (in this case). Image
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Physics 102: Lecture 19, Slide 4 Image Object Image Object Object Image 3 Cases for Converging Lenses This could be used as a projector. Small slide on big screen This is a magnifying glass This could be used in a camera. Big object on small film Upright Enlarged Virtual Inverted Enlarged Real Inverted Reduced Real Inside F Past 2F Between F & 2F
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Physics 102: Lecture 19, Slide 5 1) Rays parallel to principal axis pass through focal point. 2) Rays through center of lens are not refracted.
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