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In Figure. , find the position of final ...

In Figure. , find the position of final image formed.

Text Solution

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For convex lens:
`v=(uf)/(u+f)=(-15xx10)/(-15+10)=30cm`
For concave lense: `u=(30-25)=5cm`
`u=(30-25)=5cm`
`v=(uf)/(u+f)=(5(-10))/(5-10)=10cm`
So, final image is formed 10 cm to the right of the concave lens.
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Knowledge Check

  • A point ofject 'O' lies in front of the lens as shown in figure. Find the final position of image formed by the combined lenses.

    A
    `10 cm` to the right of the lens C
    B
    `15 cm` to the right of the lens C
    C
    `20 cm` to the right of the lens C
    D
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  • If the optic axis of convex and concave lenses are separated by a distance 5 mm as shown in the figure. Find the coordinate of the final image formed by the combination if parallel beam of light is incident on lens. Origin is at the optical centre of convex lens

    A
    `(25 cm,0.5cm)`
    B
    `(25 cm,0.25 cm)`
    C
    `(25 cm,-0.5 cm)`
    D
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  • A point is placed in front of thick plane mirror as shown in figure. Find the location of final image w.r.t. object.

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