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The graph shows how the magnification m ...

The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used?

A

`(b)/(c)`

B

`(a)/(c)`

C

`(b^(2)c)/(a)`

D

`(b^(2))/(ac)`

Text Solution

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The correct Answer is:
A
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The graph shows how the magnification m produced by a convex thin lens varies with image distance v . What was the focal length of the used ?

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Knowledge Check

  • An object is placed at a distance of 1.5 m from a screen and a convex lens is interposed between them. The magnification produced is 4 . What is the focal length of the lens ?

    A
    `1m`
    B
    `0.5 m`
    C
    `0.24 m`
    D
    `2 m`

  • A concave lens is placed in contact with a convex lens of focal length 25 cm . The combination produces a real image at a distance of 80 cm , when an object is at a distance of 40 cm . What is the focal length of concave lens ?

    A
    `-400 cm`
    B
    `-200 cm`
    C
    `+400 cm`
    D
    `+200 cm`

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