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A converging lens has a focal length of 5cm. Determine its power

Physics
WAEC 2003
A converging lens has a focal length of 5cm. Determine its power
  • A. +20.0
  • B. +0.2
  • C. -20.00
  • D. -0.2
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Correct Answer: Option A
Explanation
p = \(\frac{100}{f} = \frac{100}{+5} = +20\)
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