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Q: A beam of parallel rays close to the principal axis are incident on a convex lens. At which point will they converge :
  • A. At 2F
  • B. Between F and 2F
  • C. Beyond 2F
  • D. At F
Correct Answer: Option D - A beam of parallel rays close to the principal axis are incident on a convex lens At F point will they converge.
D. A beam of parallel rays close to the principal axis are incident on a convex lens At F point will they converge.

Explanations:

A beam of parallel rays close to the principal axis are incident on a convex lens At F point will they converge.