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If the power of a lens is - 4.0 D, then ...

If the power of a lens is - 4.0 D, then it means that the lens is a

A

concave lens of focal length -50 m

B

convex lens of focal length +50 cm

C

concave lens of focal length -25 cm

D

convex lens of focal length -25 m

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Knowledge Check

  • If the power of a lens is - 4.0D then it means that the lens is a

    A
    concave lens of focal length -50 m
    B
    convex lens of focal length +50 cm
    C
    concave lens of focal length -25 cm
    D
    convex lens of focal length -25 m

  • The power of a lens is -4.0 D. what is the nature of the lens?

    A
    Plane
    B
    Concave
    C
    Convex
    D
    Plano convex

  • If the power of a lens is 0.1 D, its focal length is

    A
    1 m
    B
    10 m
    C
    100 m
    D
    `-10 m`

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