Home
Class 12
PHYSICS
A man who cannot see clearly beyond 5m w...

A man who cannot see clearly beyond `5m` wants to see starts clearly. He should use a lens of focal length

A

`-100 m`

B

`+5 m `

C

`-5 m `

D

Very large

Text Solution

Verified by Experts

The correct Answer is:
C
For lens `u=` wants to see `=oo,v=` can see `=-5m`
`:.` From `(1)/(f)=(1)/(v)-(1)/(u)implies (1)/(f)=(1)/(-5)-(1)/(oo)impliesf=-5m.`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    A2Z|Exercise Problems Based On Mixed Concepts|37 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Section B - Assertion Reasoning|19 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Prism Theory And Dispersion Of Light|45 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MAGNETISM AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A man cannot see clearly the objects beyond a distance of 20 cm from his eyes. To see distant objects clearly he must use which kind of lenses and of what focal length

A person can not see the objects clearly placed at a distance more than 40 cm . He is advised to use a lens of power

A person who can see near objects clearly but cannot see clearly the distant objects is called __________.

Anil’s uncle cannot see nearby objects clearly, but he can see distant objects clearly. How is it corrected ?

A person cannot see objects clearly beyond 125 cm. The power of the lens to correct the vision is

A person who can see things most clearly at a distance of 10 cm . Requires spectacles to enable to him to see clearly things at a distance of 30 cm. What should be the focal length of the spectacles ?

Anil’s uncle cannot see nearby objects clearly, but he can see distant objects clearly. What is the eye defect he is suffering from ?

A short sighted person cannot see clearly beyond 2 m . Calculate power of the lens required to correct his eye to normal vision.

Though a woman can see the distant objects clearly, she cannot see the nearby objects clearly. She is suffering from the defect of vision called :

A2Z-GEOMETRICAL OPTICS-Optical Instruments
  1. A person suffering from hypermetropia requires which type of spectacle...

    Text Solution

    |

  2. A man who cannot see clearly beyond 5m wants to see starts clearly. He...

    Text Solution

    |

  3. A man can see only between 75 cm and 200 cm . The power of lens to cor...

    Text Solution

    |

  4. A man can see the objects upto a distance of one metre from his eyes. ...

    Text Solution

    |

  5. A man can see the object between 15 cm and 30 cm. He uses the lens to...

    Text Solution

    |

  6. The far point of a myopia eye is at 40 cm. For removing this defect, t...

    Text Solution

    |

  7. A man suffering from myopia can read book placed at 10 cm distance. F...

    Text Solution

    |

  8. A person is suffering from myopic defect. He is able to see clear obje...

    Text Solution

    |

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

    Text Solution

    |

  10. A person's near point is 50 cm and his far point 3m. answer the follow...

    Text Solution

    |

  11. A convex lens of focal length 40 cm is in contact with a concave lens ...

    Text Solution

    |

  12. Two parallel pillars are 11 km away from an observer. The minimum dist...

    Text Solution

    |

  13. A person who can see things most clearly at a distance of 10 cm. Requi...

    Text Solution

    |

  14. Far points of myopic eye is 250 cm, then the focal length of the lens ...

    Text Solution

    |

  15. A man can see clearly up to 3 metres. Prescribes a lens for his specta...

    Text Solution

    |

  16. A satisfactory photographic print is obtained when the exposure time i...

    Text Solution

    |

  17. A person uses a lens of power +3D to normalise vision. Near point of h...

    Text Solution

    |

  18. A student can distinctly see the object upto a distance 15 cm. He want...

    Text Solution

    |

  19. The exposure time of a camera lens at the (f)/(2.8) setting is (1)/(2...

    Text Solution

    |

  20. The focal lengths of the objective and eye- lens of a microscope are 1...

    Text Solution

    |