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27-02-2024
Physics

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For the astronomical telescope, the focal length of the objective lens is fₒ and the eyepiece lens is fₑ. Then the tube length of the telescope is:______ₐ) fₒ + fₑ
b) |fₒ - fₑ|
c) 1/fₒ + 1/fₑ
d) fₒ - fₑ

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