Home
Class 11
PHYSICS
A person's near point is 50 cm and his f...

A person's near point is `50 cm` and his far point `3m`. Power of the lenses he requires for
`(i)` reading and
`(ii)` for seeing distant stars are

A

–2 D and + 3 D

B

+2 D and –3 D

C

+2 D and –0.33 D

D

–2 D and + 0.33 D

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 student's near point is 0.5 m and far point is 3m . What are the powers of the spectacle lenses required for (a) reading the books and (b) seeing the distant objects ?

The near point of a person is 50 cm and the far point is 1.5m . The spectacles required for reading purpose and for seeing distant objects are respectively

A person whose far-point is at 30cm wants to read at 50cm . The power of the lens should be

The far point of a myopic person is 6 metre . Calculate the power of the lens he requires for distant vision.

DISHA-RAY OPTICS AND OPTICAL INSTRUMNTS-PHYSICS
  1. A telescope consists of two lenses of focal lengths 0.3 m and 3 cm re...

    Text Solution

    |

  2. The layered lens as shown is made of two types of transparent material...

    Text Solution

    |

  3. A person's near point is 50 cm and his far point 3m. Power of the lens...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |