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Q: The focal length of a convex lens is ……….
  • A. positive
  • B. negative
  • C. zero
  • D. infinite
Correct Answer: Option A - Focal length of convex lens is positive while concave lens is negative.
A. Focal length of convex lens is positive while concave lens is negative.

Explanations:

Focal length of convex lens is positive while concave lens is negative.