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Q: A object is placed on the principal axis of a lens of power–10D, at a distance of 15 cm. The image formed is _____.
  • A. real and erect
  • B. real and inverted
  • C. virtual and erect
  • D. virtual and inverted
Correct Answer: Option C - If an object is placed on the principal axis of a lens of power -10D, at a distance of 15 cm the image formed will be virtual and erect.
C. If an object is placed on the principal axis of a lens of power -10D, at a distance of 15 cm the image formed will be virtual and erect.

Explanations:

If an object is placed on the principal axis of a lens of power -10D, at a distance of 15 cm the image formed will be virtual and erect.