P35_026 - 26(a(b(c and(d Our first step is to form the image from the first lens With p1 = 10 cm and f1 = −15 cm Eq 35-9 leads to 1 1 1 = p1 i1

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Unformatted text preview: 26. (a) (b) (c) and (d) Our first step is to form the image from the first lens. With p1 = 10 cm and f1 = −15 cm, Eq. 35-9 leads to 1 1 1 + = p1 i1 f1 =⇒ i1 = −6 cm . The corresponding magnification is m1 = −i1 /p1 = 0.6. This image serves the role of “object” for the second lens, with p2 = 12 + 6 = 18 cm, and f2 = 12 cm. Now, Eq. 35-9 leads to 1 1 1 + = p2 i2 f2 =⇒ i2 = 36 cm with a corresponding magnification of m2 = −i2 /p2 = −2, resulting in a net magnification of m = m1 m2 = −1.2. The fact that m is positive means that the orientation of the final image is inverted with respect to the (original) object. The height of the final image is (in absolute value) (1.2)(1.0 cm) = 1.2 cm. The fact that i2 is positive means that the final image is real. ...
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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