A telescope is constructed from two converging lenses. The objective lens has focal length 1.80 m. The overall angular magnification of the telescope is -9.00 and the final image is at infinity. What is the length of the telescope (the distance between the two lenses)?
(a) 1.80 m
(b) 2.00 m
(c) 2.10 m
(d) 2.20 m
(e) 3.60 m
(f) none of the above answers
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