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Chapter 34, Problem 111 Your answer is incorrect. Try again. The figure shows a beam expander made with two coaxial converging lenses of focal lengths f and 2 and separation d-2. The device can expand a laser beam while keeping the light rays in the beam parallel to the central axis through the lenses. Suppose a uniform laser beam of width w; = 3.2 mm and intensity I, = 9.2 kW/m2 enters a beam expander for which f1 = 13.3 cm and r2 = 30.6 cm. What are (a) W and (b) I of the beam leaving the expander? (c) What value of d is needed for the beam expander if lens 1 is replaced with a diverging lens of focal length fi--27cm? W, (a) NumberT 2.3007 (b) Number 7.36 (c)Number Units Unit Unit

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0 0O Coo Couderei euse い12.3cm 12-3C 2.2 0 13.3 ;3 13-3Xo tau o -62x 163 30.63 7-36mm 12.3Lw 92x(3 2) (7.36)し S.1696 1위 -2A0, iway must be oril formed a fecy 30.62

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