Home
Class 12
PHYSICS
A symmetric doule convex lens is cut in ...

A symmetric doule convex lens is cut in two equal parts by a plane perpendiculr to the pricipal axis. If the power of the original lens was 4D, the power of a cut lens will be

A

2D

B

3D

C

4D

D

5D

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Objective -2|7 Videos

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Exercises|79 Videos

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Question For short Answer|19 Videos

  • GAUSS LAW

    HC VERMA|Exercise Exercises|24 Videos

  • LIGHT WAVES

    HC VERMA|Exercise Exercises|41 Videos

Similar Questions

Explore conceptually related problems

The focal length of a convex lens is f. When it is divided in two parts by a plane parallel to the principal axis, focal length of each part will be _____

Focal length of an equiconvex lens is 20 cm. If we cut it once perpendicular to principal axis in and then along principal axis. Then, focal length of each part will be:

The power of convex lens is _________.

Power of a lens is -4D, then its focal length is

A thin bar magnetic is cut into two equal parts by cutting is perpendicular to ties length. What is the new magnetic moment of each part ? What is the time - period of each part as compared to that of the original magnet if if vibrated in the same field ?

A thin sphereical shell having uniform density is cut in two parts by as plane and kept separated as shown in figure. The point A is the center of the plane section of the first part and B is the center of the plane section of the second part. Show that the gravitational field at A due to the first part is equal in magnitude to the gravitational field at B due to the second part.

1D is the power of a lens whole focal length is ________.

HC VERMA-GEOMETRICAL OPTICS-Objective -1
  1. A point source of light is placed in front of a plane mirror.

    Text Solution

    |

  2. Total internal reflection can take only if

    Text Solution

    |

  3. In image formation from spherical mirrors, only paraxial rays are cons...

    Text Solution

    |

  4. A point object is placed at a distance of 30cm from a convex mirror of...

    Text Solution

    |

  5. Figure shows two rays A and B being reflected by a mirror and going as...

    Text Solution

    |

  6. The image formed by a concave mirror

    Text Solution

    |

  7. Figure shows three transparent media of refractive indices mu1, mu2 an...

    Text Solution

    |

  8. Four modifications are suggested in the lens formula to incude the eff...

    Text Solution

    |

  9. A double convex lens has two surfaces of equal radii R and refractive ...

    Text Solution

    |

  10. A point source of light is placed at a distance of 2f from a convergin...

    Text Solution

    |

  11. A parallel beam of light is incident on a converging lens parallel to ...

    Text Solution

    |

  12. A symmetric doule convex lens is cut in two equal parts by a plane con...

    Text Solution

    |

  13. A symmetric doule convex lens is cut in two equal parts by a plane per...

    Text Solution

    |

  14. Two concave lenses L1 and L2 are kept in contact with each other. If t...

    Text Solution

    |

  15. A thin lens is made with as material having refractive index mu=1.5. b...

    Text Solution

    |

  16. A convex lens is made of a material having refractive index 1.2. Both ...

    Text Solution

    |

  17. A point object O is placed on the principal axis of a convex lens of f...

    Text Solution

    |

  18. The rays of different colours fail to converge at a point after going ...

    Text Solution

    |