Home
Class 10
PHYSICS
Write a formula to find focal length of ...

Write a formula to find focal length of a bi-concave lens, if distance of far point is given.

Text Solution

Verified by Experts

f=-D (given D=Distance of far point)
Promotional Banner

Topper's Solved these Questions

  • HUMAN EYE AND COLOURFUL WORLD

    VGS PUBLICATION-BRILLIANT|Exercise CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION-II) (1 MARKS QUESTIONS)|11 Videos

  • HUMAN EYE AND COLOURFUL WORLD

    VGS PUBLICATION-BRILLIANT|Exercise CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION-II) (Conceptual understanding )|28 Videos

  • HUMAN EYE AND COLOURFUL WORLD

    VGS PUBLICATION-BRILLIANT|Exercise QUESTIONS GIVEN IN THE LESSON (4 MARK QUESTIONS)|1 Videos

  • GRAVITATION

    VGS PUBLICATION-BRILLIANT|Exercise ADDITIONAL PROBLEMS|4 Videos

  • KINETIC THEORY

    VGS PUBLICATION-BRILLIANT|Exercise Additional Problems|5 Videos

Similar Questions

Explore conceptually related problems

On what factor does focal length of a lens depend ?

Is there any limit to change of focal length of eye lens ?

What changes the focal length of the eye lens?

What is called a focal point of a concave mirror ?

The change in focal length of an eye lens is caused by the action of the

Through an experiment, find out the focal length of the lens.

VGS PUBLICATION-BRILLIANT-HUMAN EYE AND COLOURFUL WORLD-CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION-I) (1/2 MARKS QUESTIONS)
  1. Myopia patients cannot see the objects

    Text Solution

    |

  2. Which lens can bring the image of the object kept beyond far point, be...

    Text Solution

    |

  3. Write a formula to find focal length of a bi-concave lens, if distance...

    Text Solution

    |

  4. f= -D. What does negative sign indicate in the above formula ?

    Text Solution

    |

  5. For an object at infinite distance, what do you substitute for 'u' in ...

    Text Solution

    |

  6. Which defect of vision does occur, when the eye has a minimum focal le...

    Text Solution

    |

  7. Which vision defect is called as "far sightedness" ?

    Text Solution

    |

  8. Name the vision defect found in the figure.

    Text Solution

    |

  9. What is represented by 'H', given in the above figure ?

    Text Solution

    |

  10. Which lens is used to rectify the vision defect, hypermetropia ?

    Text Solution

    |

  11. What is the focal length of bi-convex lens to use to correct a hyperme...

    Text Solution

    |

  12. What is the vision defect, when the ability of accommodation of the ey...

    Text Solution

    |

  13. Presbyobia means

    Text Solution

    |

  14. A person is suffering from presbyopia which type of lens is prefarable...

    Text Solution

    |

  15. Ramesh used spectacles for presbyopia. His spectacles consists of

    Text Solution

    |

  16. In which terms, the degree of convergence or divergence of light ray t...

    Text Solution

    |

  17. If the focal length of a lens fis in cm, then write the formula of pow...

    Text Solution

    |

  18. What is units of power of lens ?

    Text Solution

    |

  19. Doctors advised to use 2D lens. What is its focal length ?

    Text Solution

    |

  20. A lens has focal length of 50 cm. What is its power ?

    Text Solution

    |