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Unformatted text preview: Craig Ogilvie Craig Ogilvie 11 Summary Lecture 33 § real image s’ > 0 virtual image s’ < 0 § converging lens f > 0 (real image of infinitely far object), § diverging lens f < 0 (virtual image of infinitely far object) f s s 1 ' 1 1 = + s s ' m size object size image ion magnificat = = Craig Ogilvie Craig Ogilvie 22 Goal § Develop problemsolving skills for optics problems Craig Ogilvie Craig Ogilvie 33 Question § You are trying to focus the image from LCDprojector onto screen, without moving the screen, changing the focal length of the lens, or changing where the LCD is. § LCDlight source: as object, lightsource is 10.0m from screen § Focal length of converging lens is f=0.3m § Write down your plan of how you will solve problem § Share with your neighbor 1. Identify principle • move lens so that real image is located exactly at screen 2. Draw Diagram 3. Match quantities in diagram/problem to lens equation 4. Solve 5. Check for consistency between diagram, numerical solution OK, draw a diagram Craig Ogilvie...
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This note was uploaded on 09/20/2011 for the course PHYS 222 taught by Professor Johnson during the Spring '07 term at Iowa State.
 Spring '07
 Johnson
 Physics

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