An astronomical telescope has objectives and eye-piece lenses of focal length 3.5m and 5cm respectively….

An astronomical telescope has objectives and eye-piece lenses of focal length 3.5m and 5cm respectively. Determine the magnifying power of the telescope when in normal adjustment
  • A.
    70.0
  • B.
    17.5
  • C.
    7.0
  • D.
    0.7
Correct Answer: Option A
Explanation

Magnify power = (frac{f_o}{f_e})
= (frac{3.5 times 100}{5.0})
= 70

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