Home
Class 12
PHYSICS
An obsever looks at a distant tree of he...

An obsever looks at a distant tree of height 10m with a telescope of magnifying power of 20. to the observer the tree appears:

A

`10` times taller

B

10 times nearer

C

`20` times taller

D

`20` times nearer

Text Solution

Verified by Experts

The correct Answer is:
D

A telescope resolve and brings objects closer. Hence with a telescope of magnifying power `20`, the tree appears `20` times nearer.
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    PRADEEP|Exercise Problems for practice|4 Videos
  • OPTICS

    PRADEEP|Exercise Comprehension 1|1 Videos
  • OPTICS

    PRADEEP|Exercise Value based questions|3 Videos
  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

When we view object of height 15 m with a telescop of magnifying power 10. the object appears _____

The focal length of the objective of an astronomical telescope is 1.0 m. If the magnifying power of the telescope is 20, find the focal length of the eyepiece and the length of the telescope for the relaxed eye.

At a given point of time, the heights of trees are in proportion to the lengths of the shadows of the trees. A tree of height 25.6 m casts a shadow of 32 m. if the shadow of another tree at that point of time is 48m, then find the height of that tree.

The horizontal distance between two trees of different heights is 60m.The angle of depression of the top of the first tree when seen from the top of the second tree is 45o .If the height of the second tree is 80m, find the height of the first tree.

PRADEEP-OPTICS-Exercise
  1. The focal length of the objective and eye piece of a telescope are res...

    Text Solution

    |

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

    Text Solution

    |

  3. An obsever looks at a distant tree of height 10m with a telescope of m...

    Text Solution

    |

  4. The box of a pin hole camera, of length L, has a hole of radius a . It...

    Text Solution

    |

  5. On a hot summer night, the refractive index of air is smallest near th...

    Text Solution

    |

  6. At the first minimum adjacent to the central maximum of a single-slit ...

    Text Solution

    |

  7. In a double slit experiment, the two slits are 1mm apart and the scree...

    Text Solution

    |

  8. A Young's double slit interference arrangement with slits S(1) and S(2...

    Text Solution

    |

  9. In Young's double-slit experiment, the y-coordinate of central maxima ...

    Text Solution

    |

  10. In the Young's double-slit experiment, the intensity of light at a poi...

    Text Solution

    |

  11. A light source, which emits two wavelength lamda(1)=400nm and lamda(2)...

    Text Solution

    |

  12. Two coherent sources of intensity ratio beta interfere, then (I(max)-I...

    Text Solution

    |

  13. A transparent sheetof refractive index 1.5 is kept near one of the sli...

    Text Solution

    |

  14. A source emits electromagnetic waves of wavelength 3 m. One beam reach...

    Text Solution

    |

  15. Young's double slit experiment is first performed in air and then in a...

    Text Solution

    |

  16. A beam with wavelength lambda falls on a stack of partially reflecting...

    Text Solution

    |

  17. A ray of light intensity I is incident on a parallel glass-slab at a p...

    Text Solution

    |

  18. In a Young's double slit experiment, the slit separation is 1mm and th...

    Text Solution

    |

  19. In the ideal double-slit experiment, when a glass-plate (refractive in...

    Text Solution

    |

  20. A single slit located effectively at infinity in front of a lens of fo...

    Text Solution

    |