Multiple Choice Questions on The magnitude of focal length of a concave lens is 2 m What is the power of the lens ........ for CAPF (AC) Exam Preparation

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Multiple Choice Questions

The magnitude of focal length of a concave lens is 2 m What is the power of the lens ........

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    The magnitude of focal length of a concave lens is 2 m. What is the power of the lens?
    This questions was previously asked in
    CAPF 2022 Paper-1
    View All CAPF Previous Year Papers

    + 0.5 dioptre

    Incorrect Answer

    -0.5 dioptre

    Correct Answer

    +2.0 dioptre
     

    Incorrect Answer

    -1.0 dioptre

    Incorrect Answer
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    Explanation:

    -0.5 dioptre.

    • The focal length of the concave lens is always negative.
    • Hence, the given focal length is -2m.
    • Formula: Power = 1/focal length.
    • Hence, Power is -0.5 dioptre.

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