Discussion
A telescope and microscope differ in that______.
Answer: A
A telescope has an objective of large focal length and an eyepiece of small focal length.
Its magnification is \(f_o/f_e\), so a long objective focal length helps. A microscope is the other way round: its objective has a very short focal length, of a few millimetres, to give a large magnified real image which the eyepiece then magnifies again.
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