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Homework3-chap2322

Homework3-chap2322 - Homework 3 Chapt 23 22 23.64 Model Use...

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Homework 3 –Chapt. 23 & 22 23.64. Model: Use ray tracing to locate the image. Assume the converging lens is a thin lens. Solve: (a) The figure shows the ray-tracing diagram using the steps of Tactics Box 23.2. After refraction, the three special rays converge and give an image 50 cm away from the converging lens. Thus, s = + 50 cm. The image is inverted and its height is 0.65 cm. (b) Using the thin-lens formula, 1 1 1 1 1 1 75 cm 30 cm s s f s + = + = 1 1 50 cm s = 50 cm s ′ = The image height is obtained from 50 cm 2 75 cm 3 s M s = - = - = - The image height is ( )( ) 2/3 1 cm 0.67 cm. h Mh ′ = = - = - Because of the negative sign, the image is inverted. These results agree with those obtained in part (a).

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23.66. Model: Use ray tracing to locate the image. Assume the diverging lens is a thin lens. Solve: (a) The figure shows the ray-tracing diagram using the steps of Tactics Box 23.3. After refraction from the diverging lens, the three special rays do not converge. However, the rays appear to meet at a point that is 20 cm on the same side as the object. So
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Homework3-chap2322 - Homework 3 Chapt 23 22 23.64 Model Use...

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