Home
Class 12
PHYSICS
The given equi-convex lens is broken int...

The given equi-convex lens is broken into four parts and rearranged as shown. If the initial focal length is f, then after rearrangement the equivalent focal length is

A

`f`

B

`f//2`

C

`f//4`

D

`4f`

Text Solution

Verified by Experts

The correct Answer is:
B
Focal length of any one part will be `2f.`
`:. 1/F=1/(2f)+1/(2f)+1/(2f)+1/(2f) or F=f/2`
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Objective Questions|1 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Subjective|29 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Assertion And Reason|13 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

The given lens is broken into four parts rearranged as shown. If the initial focal length is f, then after rearrangement the equivalent focal length is

If f is focal length of the lens, then the power of a lens is equal to

The focal length of a convex lens is

When a thin convex lens is put in contact with a thin concave lens of the same focal length (f), then the resultant combination has focal length equal to

A convex lens of focal length 'f' is placed in contact with a concave lens of the same focal length. The equivalent focal length of the combination is

Define first principal focal length of a convex lens.

A concave mirror and a convex lens have the same focal length in air. When they are submerged in glycerine, the focal length

DC PANDEY-REFRACTION OF LIGHT-Level 1 Objective
  1. A thin equi-convex lens is made of glass of refractive index 1.5 and i...

    Text Solution

    |

  2. A ray of light, travelling in a medium of refractive index mu, is inci...

    Text Solution

    |

  3. The given equi-convex lens is broken into four parts and rearranged as...

    Text Solution

    |

  4. A thin convergent glass lens (mug=1.5) has a power of +5.0D. When this...

    Text Solution

    |

  5. Two convex lenses of focal length 10 cm and 20 cm respectively placed ...

    Text Solution

    |

  6. A prism can have a maximum refracting angle of (thetaC=critical angle ...

    Text Solution

    |

  7. A ray is ihncident at an angle of incidence ii on one surface of a pri...

    Text Solution

    |

  8. The refracting angle of a prism is A and refractive index of the mater...

    Text Solution

    |

  9. A prism of refractive index sqrt2 has refractive angle 60^@. In the or...

    Text Solution

    |

  10. The focal length of a combination of two lenses is doubled if the sep...

    Text Solution

    |

  11. A convexo-concave convergent lens is made of glass of refractive index...

    Text Solution

    |

  12. An optical system consists of a thin convex lens of focal length 30 cm...

    Text Solution

    |

  13. In the figure shown, the angle made by the light ray with the normal i...

    Text Solution

    |

  14. For refraction through a small angled prism, the angle of minimum devi...

    Text Solution

    |

  15. A ray of light passes from vaccum into a medium of refractive index n....

    Text Solution

    |

  16. A thin convex lens of focal length 30 cm is placed in front of a plane...

    Text Solution

    |

  17. One side of a glass slab is silvered as shown in the figure. A ray of ...

    Text Solution

    |

  18. A prism has refractive index sqrt((3)/(2)) and refractive angle 90^@. ...

    Text Solution

    |

  19. In figure, an air lens of radius of curvature of each surface equal to...

    Text Solution

    |

  20. A point object is placed at a distance of 12 cm from a convex lens of ...

    Text Solution

    |