Home
Class 10
PHYSICS
An object is kept 60 cm from a lens give...

An object is kept 60 cm from a lens gives a virtual image 20 cm in front of the lens. What is the focal length of the lens? Is is a converging lens or diverging lens?

Text Solution

Verified by Experts

The correct Answer is:
1.6 cm
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

A concave lens is a converging lens.

The focal length of a lens depends on

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.

If the focal length of the objective lens is increased then

Fill in the blanks : The focal length of a ………… lens is positive.

Fill in the blanks : The focal length of a ………… lens is negative.

An object is kept at 10 cm in front of a convex lens . Its image is formed on the screen at 15 cm from the lens. Calculate (i) the focal length of the lens (ii) the magnification produced by the lens.

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

An object of height 2 cm is kept at 30 cm from a convex lens . Its real image is formed at 60 cm from the lens .Find the focal length and power of the lens.

NAVNEET PUBLICATION-LENSES-EXERCISE
  1. Doctor has prescribed a lens having power +1.5D. What will be the foca...

    Text Solution

    |

  2. Solve the following examples/ numerical problems: An object of heigh...

    Text Solution

    |

  3. An object is kept 60 cm from a lens gives a virtual image 20 cm in fro...

    Text Solution

    |

  4. Solve the following examples/ numerical problems: < br > What is the p...

    Text Solution

    |

  5. Solve the following examples/ numerical problems: The power of a con...

    Text Solution

    |

  6. Calculate the focal length of a corrective lens having power+2.5D.

    Text Solution

    |

  7. Solve the following examples/ numerical problems: Calculate the foca...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |