In a projection lantern of focal length f, the object distance u, is such that...
PHYSICS
JAMB 1994
In a projection lantern of focal length f, the object distance u, is such that
- A. u > 2f > f
- B. u< f< 2f
- C. u = f< 2f
- D. f< u< 2f
Correct Answer: D. f< u< 2f
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