Multiple choice general knowledge math & puzzles

What is the name of the point where light rays from infinity coverge after passing through a lens?

  1. Focus

  2. Parabola

  3. Center

  4. Infinity

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A Correct answer
Explanation

The focus (or focal point) is the specific point where parallel light rays (rays from infinity) meet after passing through a converging lens. The distance from the lens to this point is known as the focal length.