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Statement of a problem № 3995

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A combination of two thin convex lenses are placed as in Fig. 15.9. An object is placed 5 cm in front of the first lens which has a focal length of 10 cm. The second lens is 10 cm behind the first lens and has a focal length of 12 cm. (a) Locate the image of the first lens with the aid of a ray diagram. (b) Is the image real or virtual? Erect or inverted? (c) Locate the final image for the lens combination. (d) Is the final image real or virtual? erect or inverted?

Solution:
A combination of two thin convex lenses are placed as in Fig. 15.9. An object is

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