Home
Class 12
PHYSICS
Calculate the focal length of a convex l...

Calculate the focal length of a convex lens of crown glass of dispersive power 0.012 and concave lens of dispersive power 0.020 that from an achromatic coverging combination of focal length 0.3 m when placed in contact.

Text Solution

Verified by Experts

The correct Answer is:
12 cm for convex lens, 20 cm for concave lens
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs with One or More Options Correct|30 Videos

  • ELECTROSTATICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numberical Problems|73 Videos

  • HEAT AND THERMAL EXPANSION

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

Similar Questions

Explore conceptually related problems

A converging system of convex lenses free from chromatic aberration and of focal length 2.5 cm is to be constructed by using a convex lens of focal length 2 cm and dispersive power 0.04 and another convex lens of dispersive power 0.03. What should be the focal length of the second lens and at what distance from the first lens should it be placed ?

The power of a lens of focal length 0.5 m is :

The power of a lens of focal length 0.5 m is :

What is the power of a convex lens of focal length 0.5 m?

A camera lens (f=0.20m) is made of two components, one of crown glass (dispersive power 0.02) and the other of flint glass (dispersive power 0.04) Find the focal length of the component lenses.

A convex lens of power 2 D and a concave lens of focal length 40cm are kept in contact, find (a) Power of combination , (b) Equivalent focal length

A convex lens of focal length 30 cm and a concave lens of focal length 0.6m are placed in contact. Find the power of the combination.

what is the power of a convex lens having focal length 0.5 m ?

PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Unsolved Numerical Problems
  1. A prism of angle 60^(@) is made of glass of refractive index 1.50 for ...

    Text Solution

    |

  2. An achromatic telescope objective of focal length 1.5m is consists of...

    Text Solution

    |

  3. Calculate the focal length of a convex lens of crown glass of dispersi...

    Text Solution

    |

  4. In an astronomical telescope, focal length of objective lens is 75 cm ...

    Text Solution

    |

  5. An astronomical telescope consisting of two convex lenses of focal len...

    Text Solution

    |

  6. How would you use two plano-convex lenses of focal lengths 6cm and 4cm...

    Text Solution

    |

  7. A short-sighted person cannot see objects situated beyond 2m from him ...

    Text Solution

    |

  8. An astronomical telescope in normal adjustment hasa tube length of 93 ...

    Text Solution

    |

  9. The focal lengths of the objective and the eye-piece of an astronomica...

    Text Solution

    |

  10. A Keplerian telescope with magnification T = 15 was submerged into wat...

    Text Solution

    |

  11. A man stands on vertical tower of height 20 cm. Calculate the distanc...

    Text Solution

    |

  12. The redius of curvature of the convex face of a plano-convex lens is 1...

    Text Solution

    |

  13. An object is at a distance of a=36 cm from a lens with a focal length ...

    Text Solution

    |

  14. The focal length of a thin biconvex lens is 20 cm. When an object is m...

    Text Solution

    |

  15. An object is placed 20 cm to the left of a convex lens of focal length...

    Text Solution

    |

  16. A glass sphere with centre O is shown in the figure, AOB and COD are t...

    Text Solution

    |

  17. A hollow sphere of glass of inner and outer radii R and 2R respectivel...

    Text Solution

    |

  18. Two thin similar watch glass pieces are joined together,front to fron...

    Text Solution

    |

  19. Two convex lenses of focal lengths f(1) and f(2) are placed coaxially,...

    Text Solution

    |

  20. A prism of angle 60^(@) deviates a ray of light through 31^(@) for two...

    Text Solution

    |