Lecture%2037%202220%20Spring%202009

Lecture%2037%202220%20Spring%202009 - Reminders and...

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1 Reminders and Announcements • HW 21 is due Friday • Exam 3 is next Monday (Chs. 31-35) Help Room Hours (Physics 117) • Help Room Hours (Physics 117): – M 4-8 pm, T 3-6:30, W 3-6:30, R 4:30-8, F 2-6 Ray Diagrams •A ray diagram can be used to determine the position and size of an image • They are graphical constructions which They are graphical constructions which reveal the nature of the image • They can also be used to check the parameters calculated from the mirror and magnification equations Drawing a Ray Diagram • To draw a ray diagram, you need to know: – The position of the object – The locations of the focal point and the center of curvature • Three rays are drawn – They all start from the same position on the object • The intersection of any two of the rays at a point locates the image – The third ray serves as a check of the construction Ray Diagram for a Concave Mirror, p > R • The center of curvature is between the object and the concave mirror surface • The image is real • The image is inverted • The image is smaller than the object (reduced) Ray Diagram for a Concave Mirror, p < f • The object is between the mirror surface and the focal point • The image is virtual • The image is upright • The image is larger than the object (enlarged)
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This document was uploaded on 09/30/2009.

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Lecture%2037%202220%20Spring%202009 - Reminders and...

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