An object is placed at different distances, u, from a converging lens of focal length,...
PHYSICS
WAEC 2022
An object is placed at different distances, u, from a converging lens of focal length, 15.0cm. For what value of u does the lens act as a microscope?
- A. u = 15cm only
- B. u = 30cm only
- C. M < 15cm only
- D. u > 30cm only
Correct Answer: D. u > 30cm only
Explanation
Objects at a distance greater than two times of the focal length produces a real image, inverted and diminished in size.
→ 2 * 15 = 30cm
: At >30cm this is applicable
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