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An object is kept at 20 cm in front of a...

An object is kept at 20 cm in front of a convex lens its real image is formed at 60 cm from the lens. Find
(i) the focal length of the lens
(ii) the height of the image if the height of the object is 6 cm.

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NAVNEET PUBLICATION-LENSES-EXERCISE
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  7. Find the focal length of a convex lens which produces a virtual image ...

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  8. A real image is obtained at 30 cm from a convex lens of focal length 7...

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  9. An object is kept at 20 cm in front of a convex lens its real image is...

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  10. An object is kept at 10 cm in front of a convex lens . Its image is f...

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  11. An object is kept at 60 cm in front of a convex lens of focal length 1...

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  12. An object of height 2 cm is kept at 30 cm from a convex lens . Its rea...

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  13. If the power of a lens is 4 dioptres , find its focal length.

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  14. Find the power of a convex lens of focal length 40 cm.

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  15. Find the power of a convex lens of focal length 12.5 cm.

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  16. If for a lens , f= -20 cm, what is the power of the lens ?

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  17. An object of height 4 cm is kept in front of a concave lens of focal l...

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  18. If two convex lenses of focal lengths 10 cm and 5 cm are kept in conta...

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  19. If a convex lens of focal length 20 cm and a concave lens of focal len...

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  20. If a concave lens of focal length 12 cm and a convex lens of focal len...

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