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(D) 2 cm upward The convex lens has An achromatic convergent doublet of two lenses has a power of 2D. The convex la power of 5D. What is the ratio of dispersive power of the convergent of divergent lenses? (A) 3/2 (B) 3/5 (C) 5/3 (D) 5/2
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SOLVED:The lens shown in FIGURE CP24.52 is called an achromatic doublet, meaning that it has no chromatic aberration. The left side is flat, and all other surfaces have radii of curvature R. a. For parallel light rays coming from the left, show that the effective focal length of this two-lens system is f=R /(2 n2-n1-1), where n1 and n2 are, respectively, the indices of refraction of the diverging and the converging lenses. Don't forget to make the thin-lens approximation. b. Because of dispersio
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SOLVED:Design an achromatic doublet of 517 / 645 crown and 620 / 380 flint glasses that has an overall focal length of 20 cm . Assume the crown glass lens to be equiconvex. Determine the radii of curvature of the outer surfaces of the lens, as well as its resultant focal length for the D, C, and F Fraunhofer lines.
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SOLVED: (II) An achromatic lens is made of two very thin lenses, placed in contact, that have focal lengths of f1=-28 cm and f2=+23 cm .(a) Is the combination converging or diverging? (b) What is the net focal length? | Numerade
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