Question: Two converging lenses, one with f = 4.0 cm and the other with f = 48 cm, are made into a telescope. (a) What are

Two converging lenses, one with f = 4.0 cm and the other with f = 48 cm, are made into a telescope.
(a) What are the length and magnification? Which lens should be the eyepiece?
(b) Assume these lenses are now combined to make a microscope; if the magnification needs to be 25 ×, how long would the microscope be?

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