📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    Question

    What is the SI unit of power of a

    lens?
    A Watt Correct Answer Incorrect Answer
    B Lumen Correct Answer Incorrect Answer
    C Dioptre Correct Answer Incorrect Answer
    D Candela Correct Answer Incorrect Answer

    Solution

    Answer: Dioptre
    Explanation:   The power of a lens is the reciprocal of its focal length in meters. It is calculated using the formula   P = 1 / f.

    Practice Next

    Relevant for Exams:

    ask-question