Home
Class 12
PHYSICS
An astronomical telescope of ten-fold an...

An astronomical telescope of ten-fold angular magnification has a length of `44 cm`. The focal length of the objective is

A

`4cm`

B

`40cm`

C

`44cm`

D

`440cm`

Text Solution

Verified by Experts

The correct Answer is:
B
`L=f_(o)+f_(e)=44`and `|m|=(f_(o))/(f_(e))=10`
This gives`f_(o)=40cm`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    A2Z|Exercise Problems Based On Mixed Concepts|37 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Section B - Assertion Reasoning|19 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Prism Theory And Dispersion Of Light|45 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MAGNETISM AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

An astronomical telescope if ten -fold angular magnification has a length of 44 cm. The focal length of the objective is

An astronomical telescope has a magnifying power 10. The focal length of eyepiece is 20 cm . The focal length of objective is

A telescope has magnification 5 and length of tube 60cm then the focal length of eye piece is–

The optical length of an astronomical telescope with magnifying power of ten for normal vision is 44 cm . What is the focal length of the objective ?

An astronomical telescope has a magnifying power 10. The focal length of the eye piece is 20 cm. the focal length of the objective is -

An astronomical telescope has an angular magnification of magnitude 5 for distant object. The separation between the objective and eyepiece is 36cm and the final image is formed at infinity. Determine the focal length of objective and eyepiece.

A2Z-GEOMETRICAL OPTICS-Optical Instruments
  1. When a telescope is adjusted for parallel light, the distance of the o...

    Text Solution

    |

  2. Two convex lenses of focal lengths 0.3m and 0.05m are used to make a t...

    Text Solution

    |

  3. The diameter of the objective lens of a telescope is 5.0m and wavelen...

    Text Solution

    |

  4. A Galilean telescope has objective and eye- piece of focal lengths 200...

    Text Solution

    |

  5. An astronomical telescope of ten-fold angular magnification has a leng...

    Text Solution

    |

  6. The focal lengths of the lenses of an astronomical telescope are 50cm ...

    Text Solution

    |

  7. Sun's diameter is 1.4 xx10^(9)m and its distance from the earth is 10^...

    Text Solution

    |

  8. In a terrestrial telescope, the focal length of objective is 90cm, of ...

    Text Solution

    |

  9. A telescope has an objective of focal length 50cm and an eyepiece of f...

    Text Solution

    |

  10. A telescope of diameter 2m uses light of wavelength 5000 Å for viewing...

    Text Solution

    |

  11. A simple magnifying lens is used in such a way that an image is formed...

    Text Solution

    |

  12. In a simple microscope, if the final image is located at infinity then...

    Text Solution

    |

  13. In a compound microscope the objective of f(o) and eyepiece of f(e) ar...

    Text Solution

    |

  14. For a compound microscope, the focal length of object lens and eye len...

    Text Solution

    |

  15. The angular resolution of a 10cm diameter telescope at a wavelength 50...

    Text Solution

    |

  16. The diameter of objective of a telescope is 1m. Its resolving limit fo...

    Text Solution

    |

  17. A telescope has an objective lens of focal length 200cm and an eye pie...

    Text Solution

    |

  18. Magnification of a compound microscope is 30. Focal length of eye- pie...

    Text Solution

    |

  19. A Galileo telescope has an objective of focal length 100cm and magnif...

    Text Solution

    |

  20. A compound microscope has an eye piece of focal length 10 cm and an ob...

    Text Solution

    |