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If the convex lens of focal length 10 cm...

If the convex lens of focal length 10 cm and a concave lens of focal length 50 cm are kept in contact with each other.
What will be the behaviour of the combination (behaviour as a convex lens/concave lens) ?

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The focal length of the combination of the lenses is positive. This shows that the combination will behave as a convex lens.
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Exmaples/ Numerical problems
  1. The focal length of a convex lens is 20 cm . If an object of height 2 ...

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  2. The focal length of a convex lens is 20 cm . If an object of height 2 ...

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  3. When a pin of height 4 cm is fixed at 10 cm from a convex lens, the he...

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  4. At what distance from a convex lens of focal length 5 m should a boy s...

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  5. A convex lens forms a real image of pencil at a distance of 50 cm from...

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  6. A spherical lens is used to obtain an image on a screen. The size of t...

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  7. An object of height 5 cm is held 20 cm away from a convergin lens of f...

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  8. An object is placed at 10 cm from a convex lens of focal length 12 cm....

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  9. 10 cm high object is placed at a distance of 25 cm from a converging l...

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  10. Doctor has prescribed a lens having power +2 D . What will be the foc...

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  11. An object of height 1 cm is placed in front of a concave lens of focal...

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  12. An object kept 60 cm from a lens gives a virtual image 20 cm in front ...

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  13. what is the power of a convex lens having focal length 0.5 m ?

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  14. The power of a concave lens is -2.5 dioptres. Find it focal length. ...

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  15. Calculate the focal length of a corrective lens having power +2D.

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  16. Three lenses lenses of focal length 20 cm each are kept in contact wit...

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  17. Two convex lenses of equal focal lengths are kept in contact with each...

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  18. If the convex lens of focal length 10 cm and a concave lens of focal l...

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  19. If the convex lens of focal length 10 cm and a concave lens of focal l...

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  20. If the convex lens of focal length 10 cm and a concave lens of focal l...

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