A) both objective and eye-piece have short focal length
B) both objective and eye-piece have long focal length
C) the objective has a long focal length and the eye-piece has a short focal length
D) the objective has a short focal length and the eye piece has a long focal length
Correct Answer: C
Solution :
Magnifying power of telescope is\[\frac{{{f}_{o}}}{{{f}_{e}}},\]so the magnifying power of telescope will be high if the objective has a long focal length and the eye piece has a short focal length.
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