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Q: A concave mirror is made from a section of the surface of a sphere of radius 8.0 cm. Its principal focus is at a distance of _____ from its pole.
  • A. 8.0 cm
  • B. 12.0 cm
  • C. 4.0 cm
  • D. 16.0 cm
Correct Answer: Option C -
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Explanations:

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