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

20 times nearer

B

10 times taller

C

10 times nearer

D

20 times taller

Text Solution

Verified by Experts

The correct Answer is:
D
Angular magnification is 20
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN|Exercise EXERCISE-05 (B)|35 Videos

  • GEOMETRICAL OPTICS

    ALLEN|Exercise MCQ|5 Videos

  • GEOMETRICAL OPTICS

    ALLEN|Exercise EXERCISE-04[B]|18 Videos

  • CURRENT ELECTRICITY

    ALLEN|Exercise All Questions|427 Videos

  • GRAVITATION

    ALLEN|Exercise EXERCISE 4|9 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.

ALLEN-GEOMETRICAL OPTICS-EXERCISE-05 (A)
  1. Let the x-z plane be the boundary between two transparent media. Mediu...

    Text Solution

    |

  2. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

    Text Solution

    |

  3. When monochromatic red light is used instead of blue light in a convex...

    Text Solution

    |

  4. A beaker contains water up to a height h(1) and kerosene of height h(2...

    Text Solution

    |

  5. An object 2.4 m in front of a lens forms a sharp image on a film 12 cm...

    Text Solution

    |

  6. The graph between angle of deviation (delta) and angle of incidence (i...

    Text Solution

    |

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

    Text Solution

    |

  8. A thin convex lens made from crown glass (mu = 3//2) has focal length ...

    Text Solution

    |

  9. A green light is incident from the water to the air - water interface ...

    Text Solution

    |

  10. You are asked to design a shaving mirror assuming that a person keeps ...

    Text Solution

    |

  11. A thin convex lens of focal length 'f' is put on a plane mirror as sho...

    Text Solution

    |

  12. Assuming human pupil to have a radius of 0.25 cm and a comfortable vie...

    Text Solution

    |

  13. Monochromatic light is incident on a glass prism of angle A. If the re...

    Text Solution

    |

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

    Text Solution

    |

  15. In an experiment for determination of refractive index of glass of a p...

    Text Solution

    |

  16. To find the focal length of a convex mirror , a student records the fo...

    Text Solution

    |

  17. A convex lens of focal length 30 cm , a concave lens of focal length 1...

    Text Solution

    |

  18. Two stars are 10 light years away from the earth. They are seen throug...

    Text Solution

    |

  19. To determine refractive index of glass slab using a travelling microsc...

    Text Solution

    |

  20. A hemispherical glass body of radius 10 cm and refractive index 1.5 is...

    Text Solution

    |