A telephoto lens consists of a positive lens of focal length +3.5 cm placed 2.0 cm in
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A telephoto lens consists of a positive lens of focal length +3.5 cm placed 2.0 cm in front of a negative lens of focal length -1.8 cm.
(a) Locate the image of a very distant object.
(b) Determine the focal length of the single lens that would form as large an image of a distant object as is formed by this lens combination.
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