Home
Class 12
PHYSICS
Choose the correct alternative correspon...

Choose the correct alternative corresponding to the object distance 'u', image distance 'v' and the focal length 'F' of a converging lens from the following .
The average speed of the image as the object moves with the uniform speed from distance `(3F)/(4)` to `(F)/(2)` is greater than the average speed of the image as the object moves with same speed from distance `(F)/(2) "to" (F)/(4)`
The minimum distance between a real object and its real image in case of a converging lens is `4F` where F is its focal length.

A

both are correct

B

both are incorrect

C

(i) is correct , (ii) is incorrect

D

(i) is incorrect , (ii) is correct

Text Solution

Verified by Experts

The correct Answer is:
B,C
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE-3|12 Videos
  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE-04[A]|23 Videos
  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE- 01|45 Videos
  • CURRENT ELECTRICITY

    ALLEN |Exercise EX.II|66 Videos
  • GRAVITATION

    ALLEN |Exercise EXERCISE 4|9 Videos

Similar Questions

Explore conceptually related problems

Can the average speed of an object in motion be zero ?

For thin convex lens if magnification is one then object distance and image distances are .....

For normal eye vision what is the object distance and image-distance when the object is placed at a far point? (Take the distance between the eye lens and the retina as 2.3 cm.)

A point object is placed at distance of 20 cm from a thin plane - convex lens of focal length 15 cm . The plane surface of the lens is now silvered . The image created by the system is :-

For a thin convex lens when the heights of the object is double than its image, its object distance is equal to ....... Focal length of a lens is f.

A real object is placed at a distance f from the pole of a convex mirror, in front of the convex mirror. If focal length of the mirror is f, then distance of the image from the pole of the mirror is ........

An object of size 3.0cm is placed 14cm in front of a concave lens of focal length 21cm. Describe the image produced by the lens. What happens if the object is moved further away from the lens?

For normal eye vision what is the object distance and image-distance when the object is placed at a near point? (Take the distance between the eye lens and the retina as 2.3 cm.)

An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus. The image

ALLEN -GEOMETRICAL OPTICS-EXERCISE-2
  1. A ray incident at an angle 53^(@) on a prism emerges at an angle 37^(@...

    Text Solution

    |

  2. A man of height 170cmwants to see his complete image in a plane mirror...

    Text Solution

    |

  3. Two plane mirrors at an angle such that a ray incident on a mirror und...

    Text Solution

    |

  4. If the equation of mirror is given by y= 2//pi "sin"pix (y gt 0 , 0 le...

    Text Solution

    |

  5. In the fig. shown consider the first reflection at the plane mirror an...

    Text Solution

    |

  6. The figure shows a ray incident a angle i=pi//3 of the plot drawn show...

    Text Solution

    |

  7. A ray of light is incident normally on one face of 30^(@) - 60^(@) - 9...

    Text Solution

    |

  8. A curved surface of radius R separates two medium of refractive indice...

    Text Solution

    |

  9. A curved surface of radius R separates two medium of refractive indice...

    Text Solution

    |

  10. A curved surface of radius R separates two medium of refractive indice...

    Text Solution

    |

  11. An object O is kept infront of a converging lens of focal length 30 cm...

    Text Solution

    |

  12. A converging lens of focal length f(1) is placed in front of and coaxi...

    Text Solution

    |

  13. Choose the correct alternative corresponding to the object distance 'u...

    Text Solution

    |

  14. An object and a screen are fixed at a distance d apart. When a lens of...

    Text Solution

    |

  15. A diminished image of an object is to be obtained on a screen 1.0 m fr...

    Text Solution

    |

  16. A convex lens forms an image of an object on a screen. The height of t...

    Text Solution

    |

  17. A ray is incident on the first prism at an angle of incidence of 53^(@...

    Text Solution

    |

  18. For refractin of light through a prism

    Text Solution

    |

  19. Two lenses in contact made of materials with dispersive powers in the ...

    Text Solution

    |

  20. A concave lens is placed in the path of a uniform parallel of beam of ...

    Text Solution

    |