Home
Class 12
PHYSICS
Two identical equiconvex lenses of refra...

Two identical equiconvex lenses of refractive index `3/2` and focal length 16cm are kept in contact. The space between the lenses is filled with water of refractive indext `4/3`. What is the focal length of the combination?

Promotional Banner

Topper's Solved these Questions

  • NUCLEI

    R G PUBLICATION|Exercise EXERCISE|83 Videos

  • SAMPLE PAPERS

    R G PUBLICATION|Exercise Exercise|35 Videos

Similar Questions

Explore conceptually related problems

Two lenses 3D and -1.5 D were put in contact. What is the focal length of the combination?

Two lenses of powers +5D and - 3D are in contact: Find the focal length of the combination.

Two lenses of powers +5D and 3D are in contact.Find the focal length of combination.

Two lenses of powers, 15D and +5D are in contact with each other forming a combination lens. What is the focal length of the combination?

A converging lens has focal length of 20 cm in air. It is made of a material of refractive index 1.6. If it is immersed in a liquid of refractive index 1.3, what will be its new focal length?

R G PUBLICATION-RAY OPTICS AND OPTICAL INSTRUCMENTS-EXERCISE
  1. The objective lens and eye piece lens of a Compound microscope have fo...

    Text Solution

    |

  2. Establish the lens maker's formula for a biconvex lens.

    Text Solution

    |

  3. Two identical equiconvex lenses of refractive index 3/2 and focal leng...

    Text Solution

    |

  4. Draw the ray diagram to show the location of the principal focus of a ...

    Text Solution

    |

  5. A square loop of side 3cm is placed 25 cm away from a Convex mirror of...

    Text Solution

    |

  6. A convex lens and a Concave lens of focal length 0.1m each are placed ...

    Text Solution

    |

  7. You are given a prism in which the two refracting surfaces are at 90^@...

    Text Solution

    |

  8. You are given a prism in which the two refracting surfaces are at 90^@...

    Text Solution

    |

  9. A miopic person uses a lens of power -1.25D. What is his farpoint?

    Text Solution

    |

  10. "In between a fixed object and a fixed screen, a convex lens can cast ...

    Text Solution

    |

  11. Establish the lens maker's formula for a biconvex lens.

    Text Solution

    |

  12. The focal lenghts of objectives and eyepiece of a telescope are 200cm ...

    Text Solution

    |

  13. A pair of stars of actual separation one minute of are is observed wit...

    Text Solution

    |

  14. Draw the schematic diagram of a Cassegrain telescope.

    Text Solution

    |

  15. Derive the expression for the equivalent focal length of a combination...

    Text Solution

    |

  16. Name the principle on which an optical fibre works.

    Text Solution

    |

  17. An object is placed at the focus of concave lens. Where will its image...

    Text Solution

    |

  18. What is paraxial?

    Text Solution

    |

  19. Draw a neat diagram of image formed by a convex mirror.

    Text Solution

    |

  20. What is lens maker's formula?

    Text Solution

    |