Unformatted text preview: the principal ray diagram. 24.55. Set Up: If extended backwards the ray comes from a point on the optic axis 18.0 cm from the lens and is parallel to the optic axis after it passes through the lens. Solve: (a) The ray is bent toward the optic axis by the lens so the lens is converging. (b) The ray is parallel to the optic axis after it passes through the lens so it comes from the focal point; f 5 18.0 cm. s 5 10.0 cm. s r 5 sf s 2 f 5 1 6.0 cm 21 2 6.0 cm 2 6.0 cm 2 1 2 6.0 cm 2 5 2 3.0 cm. 1 s 1 1 s r 5 1 f 1 3 2 F 2 F 1 Object Image f 5 2 6.0 cm. s 5 6.0 cm. s . f , s r 5 sf s 2 f 5 1 12.0 cm 21 8.0 cm 2 12.0 cm 2 8.0 cm 5 1 24.0 cm. 1 s 1 1 s r 5 1 f F 2 F 1 Object Image 2 3 1 Geometric Optics 2419...
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 Spring '07
 Shoberg
 Geometrical optics

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