When an astronomical telescope is in normal adjustment, the focal length of the objective lens...
PHYSICS
WAEC 1992
When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eyepiece is 2.5om. What is the distance between the lenses?
- A. 20.0cm
- B. 47.5cm
- C. 50.0cm
- D. 52.5cm
Correct Answer: D. 52.5cm
Explanation
Distance between lens = f0 + fe= 52.5cm
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