An astronomical telescope has objectives and eye-piece lenses of focal length 3.5m and 5cm respectively....
PHYSICS
WAEC 2016
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: A. 70.0
Explanation
Magnify power = \(\frac{f_o}{f_e}\)
= \(\frac{3.5 \times 100}{5.0}\)
= 70
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