Home
Class 11
PHYSICS
In an astronomical telescope in normal a...

In an astronomical telescope in normal adjustment a straight black line of length `L` is drawn on inside part of objective lens. The eye piece forms a real image of this line. The length of this image is `I`. The magnification of the telescope is

A

`(L)/(I)`

B

`(L)/(I)+1`

C

`(L)/(I)-1`

D

`(L+I)/(L-I)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

  • RAY OPTICS

    TARGET PUBLICATION|Exercise CRITICALTHINKING|34 Videos

  • MEASUREMENTS

    TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos

  • REFRACTION OF LIGHT

    TARGET PUBLICATION|Exercise EVALUATION TEST|12 Videos

Similar Questions

Explore conceptually related problems

When as tronomical telescope is adjusted for normal adjustment the finla image is formed at

In an astronomical telescope, the final image for normal vision is formed at

The image formed by the telescope in normal adjustment position is at

An astronomical telescope arranged for normal adjustment has a magnification of 6. If the length of the telescope is 35cm, then the focal lengths of objective and euye piece respectivley =, are

The focal length of objective and eye-piece of a telescope are 100 cm and 5 cm respectively. Final image is formed at least distance of distinct vision. The magnification of telescope is

In an astronomical telescope, focal length of eye piece is 5 cm and focal length of objective is 75 cm . The final image is formed at the least distance of distinct vision (=25 cm) from the eye. What is the magnifying power of the telescope ?

TARGET PUBLICATION-RAY OPTICS-COMPETITIVE THINKING
  1. To avoid spherical aberration, quality reflecting telescopes use mirro...

    Text Solution

    |

  2. An astronomical telesope has objective and eyepiece of focal lengths 4...

    Text Solution

    |

  3. A telescope using an eye piece of focal length 3 cm has a magnificatio...

    Text Solution

    |

  4. In an astronomical telescope in normal adjustment a straight black lin...

    Text Solution

    |

  5. The ratio of the diameter of the sun to the distance between the earth...

    Text Solution

    |

  6. A point object is held above a thin equiconvex lens at its focus. The ...

    Text Solution

    |

  7. A concave lens of glass, refractive index 1.5 has both surfaces of sam...

    Text Solution

    |

  8. Given a point source of light, which of the following can produce a pa...

    Text Solution

    |

  9. An infinitely long rod lies along the axis of a concave mirror of foca...

    Text Solution

    |

  10. Diameter of a plano-convex lens is 6cm and thickness at the centre is ...

    Text Solution

    |

  11. The image of an object, forme by a plano-convex lens at a distance of ...

    Text Solution

    |

  12. By placing a comvex lens of focal length equal to 15.0 cm between an o...

    Text Solution

    |

  13. For a normal eye, the cornea of eye provides a converging power of 40 ...

    Text Solution

    |

  14. A person can see objects clearly only when they lie between 50cm and ...

    Text Solution

    |

  15. The focal length of a plano-convex lens is f and its refractive index ...

    Text Solution

    |

  16. A convex lens of glass (mu(g)=1.45) has focal length f(g) is air. The ...

    Text Solution

    |

  17. Convex lens is made of glass of refractive index 1.5 If the radius of ...

    Text Solution

    |

  18. Relative difference of focal lengths of objective and eye lens in the ...

    Text Solution

    |

  19. Three thin lenses are combined by placing them in contact with each ot...

    Text Solution

    |

  20. If the focal length of the objective lens is increased then

    Text Solution

    |