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If a spherical lens has a power of, -0.2...

If a spherical lens has a power of, `-0.25` D, the focal length of this lens will be:

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A diverging lens has a focal length of 0.10 m. The power of this lens will be:

A doctor has prescribed lens of power + 1.5 D . Find the focal length of the lens. Is the prescribed lens diverging or converging ?

Knowledge Check

  • The focal length of a lens of power +4D will be

    A
    `+` 0.50 m
    B
    `-` 0.25 m
    C
    `+` 0.25 m
    D
    `-` 0.50 m

  • Power of a lens is 5 D, its focal length is :

    A
    20 m
    B
    2 m
    C
    0.2 m
    D
    none of these

  • 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`

    • Similar Questions

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    Doctor has presecribed a lens having power + 1.5D. What will be the focal length of the lens ? What is the type of the lens and what must be the defect of vision ?

    Doctor has prescribed a lens having power + 1.5 D. What will be the focal length of the lens? What is the type of the lens and what must be the defect of vision?

    A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging ?

    The focal length of a lens of power – 2D is :

    The focal length of a lens of power + 4D is :

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