Home
Class 11
PHYSICS
A telescope has an objective of focal le...

A telescope has an objective of focal length 100 cm and an eyepiece of focal length 5 cm. What is the magnifying power of the telescope when the final image is formed at the least distance of distinct vision ?

A

20

B

24

C

28

D

32

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • PHYSICAL WORLD, UNITS & MEASUREMENT

    DISHA|Exercise physics|45 Videos
  • SEMICONDUCTOR

    DISHA|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

A telescope has an objective of focal length 100 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope when it is in normal adjustment?

A telescope has an objective of focal length 200 cm and eyepiece of focal length 5 cm. Calculate its magnifying power when the final image is formed (a) at infinity and (b) at distance of distinct vision.

A small telescope has an objective lens of focal length 140 cm and an eyepiece of focal length 5.0 cm. what is the magnifying power of the telescope for viewing distant objects when (a) the telescope is in normal adjustment (i.e, when the final image is at infinity ), (b) The final image is formed at the least distance of distinct vision (25 cm )

A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is:

A small telescope has an objective lens of focal length 140 cm and eye piece of focal length 5.0 cm . What is the magnifying power of telescope for viewing distant objects when (a) the telescope is in normal adjustment (i.e. when the image is at infinity) (b) the final image is formed at the least distance of distinct vision (25 cm) .

A small telescope has an objective lens of focal length 144 cm and an eye-piece of focal length 6.0 cm . What is the magnifying power of the telescope ? What is the separation between the objective and the eye-piece ?

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then

What is the magnifying power of a simple microscope of focal length 5 cm, if the image is formed at the distance of distinct vision ?

DISHA-RAY OPTICS AND OPTICAL INSTRUMNTS-PHYSICS
  1. A person's near point is 50 cm and his far point 3m. Power of the lens...

    Text Solution

    |

  2. A ray of light falls on a transparent glass slab of refractive index 1...

    Text Solution

    |

  3. A telescope has an objective of focal length 100 cm and an eyepiece of...

    Text Solution

    |

  4. Which light rays undergoes two internal reflection inside a raindrop, ...

    Text Solution

    |

  5. When a plane mirror is placed horizontally on level ground at a distan...

    Text Solution

    |

  6. A parallel beam of light is incident on the surface of a transparent h...

    Text Solution

    |

  7. A lens made of glass whose index of refraction is 1.60 has a focal len...

    Text Solution

    |

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

    Text Solution

    |

  9. For a prism kept in air, it is found that for an angle of incidence 60...

    Text Solution

    |

  10. A person can see clearly only upto a distance of 25 cm. He wants to re...

    Text Solution

    |

  11. An object is placed at a distance of 40 cm in front of a concave mirro...

    Text Solution

    |

  12. A vessel of depth d is half filled with a liquid of refractive index m...

    Text Solution

    |

  13. The following figure shows refraction of light at the interface of thr...

    Text Solution

    |

  14. Light travels in two media A and B with speeds 1.8 × 10^(8) m s^(–1) a...

    Text Solution

    |

  15. The refractive index of a glass is 1.520 for red light and 1.525 for b...

    Text Solution

    |

  16. Which of the following is not due to total internal reflection ?

    Text Solution

    |

  17. A body is located on a wall. Its image of equal size is to be obtained...

    Text Solution

    |

  18. A concave mirror forms the image of an object on a screen. If the lowe...

    Text Solution

    |

  19. A ray of light passes through an equilateral prism (refractive index 1...

    Text Solution

    |

  20. The power of a biconvex lens is 10 dioptre and the radius of curvature...

    Text Solution

    |