12th Class Physics Ray Optics Question Bank Ray Optics Conceptual Problems

  • question_answer
    Why is the power of a lens measured as the reciprocal of its focal length?

    Answer:

                    The power of a lens represents its ability to converge or diverge a beam of light. Smaller its focal length, larger is its bending power. That is why power is expressed as reciprocal of focal length.


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