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A convex lens is placed in water. a. ...

A convex lens is placed in water.
a. Will there be any change in its focal length? B. Give reason.

Text Solution

Verified by Experts

No
b. Focal length of a mirror does not dpend upen the refractive index
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Knowledge Check

  • Assertion: If a convex lens is placed in water, its convergence power decrease. Reason: Focal length of lens is independent of refractive index of the medium.

    A
    If both the assertion and the reason are true and the reason is the correct explanation of assertion.
    B
    If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
    C
    Assertion is true, but the reason is false.
    D
    Assertion is false , but the reason is true.

  • Power of a lens is -4D, then its focal length is

    A
    4 m
    B
    `-40m`
    C
    `-0.25 m`
    D
    `-2.5m`

  • Power of a lens - 4D , then its focal length is ……….

    A
    4m
    B
    `-40m`
    C
    `-0.25m`
    D
    `-2.5m`

    • Similar Questions

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    If a thin lens is dipped in water, does its focal length change ?

    The power of convex lens with focal length 40 cm is …………

    A concave lens is kept in contact with a convex lens of focal length 20 cm. The combination behaves as a convex lens of focal length 50 cm . Find the power of concave lens.

    Power of a lens is -4D , then its focal length is :

    Which part of the human eye changes the focal length of the eye lens?

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