Home
Class 10
PHYSICS
Solve the following examples/ numerical ...

Solve the following examples/ numerical problems: < br > If a convex lens of a focal length 10 cm and a concave lens of focal length 50 cm are kept in contact with each other .(i) What will be the focal length of the combination ? (ii) what will be the power of the combination ? (iii) what will be the behaviour of the combination ( behaviour as a convex lens /concave lens )?

Text Solution

Verified by Experts

The correct Answer is:
0.1 m
Promotional Banner

Topper's Solved these Questions

  • LENSES

    NAVNEET PUBLICATION|Exercise EXERCISE|280 Videos

  • HEAT

    NAVNEET PUBLICATION|Exercise EXERCISE|135 Videos

  • REFRACTION OF LIGHT

    NAVNEET PUBLICATION|Exercise EXERCISE|141 Videos

Similar Questions

Explore conceptually related problems

If a convex lens of focal length 20 cm and a concave lens of focal length 30 cm are kept in contact with each other . (i) What will be the focal length of the combination ? (ii) What will be the power of the combination ? (iii) What will be the behaviour of the combination ?

If a concave lens of focal length 12 cm and a convex lens of focal length 20 cm are kept in contact with each other . (i) Find be the focal length of the combination ? (ii) What will be the behaviour of the combination ?

Two thin converging lenses of focal length 15 cm and 30 cm are held in contact with each other. The focal length of the combination is

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

If two convex lenses of focal lengths 10 cm and 5 cm are kept in contact with each other , What is their combined focal length ?

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

NAVNEET PUBLICATION-LENSES-EXERCISE
  1. Solve the following examples/ numerical problems: Calculate the foca...

    Text Solution

    |

  2. Three lenses having power 2, 2.5 and 1.7 D are kept touching in a row....

    Text Solution

    |

  3. Solve the following examples/ numerical problems: Two convex lenses ...

    Text Solution

    |

  4. Solve the following examples/ numerical problems: Two convex lenses ...

    Text Solution

    |

  5. Solve the following examples/ numerical problems: < br > If a convex l...

    Text Solution

    |

  6. Find the focal length of a convex lens which produces a real image at ...

    Text Solution

    |

  7. Find the focal length of a convex lens which produces a virtual image ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |