Home
Class 12
PHYSICS
A person with a normal near point (25 cm...

A person with a normal near point `(25 cm)` using a compound microscope with an objective of focal length `8.0 mm` and eye piece of focal length `2.5 cm` can bring an object placed `9.0 cm` from the objective in sharp focus. What is the separation between the two lenses ? Calculate the magnifying power of the microscope ?

Promotional Banner

Topper's Solved these Questions

  • OPTICAL INSTRUMENTS

    SL ARORA|Exercise Problems from Competitive Examination|3 Videos
  • OPTICAL INSTRUMENTS

    SL ARORA|Exercise Problems for self practice|35 Videos
  • MAGNETISM

    SL ARORA|Exercise Based on (i) Earth s Magnetism (ii) magnetic field of a bar magnet|60 Videos
  • RAY OPTICS

    SL ARORA|Exercise TYPE I|12 Videos

Similar Questions

Explore conceptually related problems

A compound microphone has an objective of focal length 1 cm and an eyepiece of focal length 2.5 cm. An object has to be placed at a distance of 1.2 cm awy from the objective for normal adjustment. a.Find the angular magnification. b.Find the length of the microscope tube.

A compound microscope has an objective of focal length 5cm & an eyepiece of focal length 10cm .An object is to be placed at a distance of 7cm away from the objective for normal adjustment.Find its angular magnification.

A compound microscope has an objective lens of 1.0 cm focal length and an eye-piece of 2.5 cm of focal length. When the object is placed at 1.1 cm from the objective, the final image is at the least distance of direct vision. Thus, the magnification produced is

A compound microscope has an objective of focal length 2 cm and eye-piece of focal length 5 cm. The distance between the two lenses is 25 cm. If the final image is at a distance of 25 cm from the eye-piece, find the magnifying power of the microscope. What would be the magnifying power if the microscope were reversed ?

SL ARORA-OPTICAL INSTRUMENTS-Problems for self practice
  1. A person with a normal near point (25 cm) using a compound microscope ...

    Text Solution

    |

  2. A converting lens of power 100 dioptre is used as a simple microscope....

    Text Solution

    |

  3. (a) An object is seen through a simple microscope of focal length 12cm...

    Text Solution

    |

  4. A converging lens of focal length 6.25 cm is used as a magnifying glas...

    Text Solution

    |

  5. The magnifying glass is made of combination of lenses of power +20 D a...

    Text Solution

    |

  6. A magnifying glass is a combination of a convex lens of focal length 5...

    Text Solution

    |

  7. Magnifying power of a simple microscope A is 1.25 less than that of a ...

    Text Solution

    |

  8. A child has near point at 10 cm. What is the maximum angular magnifica...

    Text Solution

    |

  9. The magnification produced by the objective of a compound microscope i...

    Text Solution

    |

  10. A convex lens of focal length 5cm is used as a simple microscope. What...

    Text Solution

    |

  11. The focal lengths of the objective and eye piece of a compound microsc...

    Text Solution

    |

  12. The focal lengths of the objective and the eyepiece of a compound micr...

    Text Solution

    |

  13. The focal lengths of the objective and eye piece of a microscope are 2...

    Text Solution

    |

  14. A compound microscope is made using a lens of focal 10 mm as objective...

    Text Solution

    |

  15. An astronomical telescope having a magnifying power of 8 consists of t...

    Text Solution

    |

  16. A telescope has an objective of focal length 200 cm and eyepiece of fo...

    Text Solution

    |

  17. A telescope consists of an objective of focal length 50 cm and an eyep...

    Text Solution

    |

  18. An astronimical telescope is to be designed to hve a magnifying power ...

    Text Solution

    |

  19. A telescope has an objective of focal length 30 cm and an eye piece of...

    Text Solution

    |

  20. The focal length of the objective of an astronomical telescope is 1.0 ...

    Text Solution

    |

  21. The diameter of the moon is 3.5 xx 10^(3)km and its distance from the ...

    Text Solution

    |