Home
Class 11
PHYSICS
A plano-convex lens has focal length of...

A plano-convex lens has focal length of 20 cm. the radius of its spherical suface is `(""_(a) mu_(g)=1.5)`

Promotional Banner

Topper's Solved these Questions

  • Motion in a plane

    TARGET PUBLICATION|Exercise Exercise|340 Videos
  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos

Similar Questions

Explore conceptually related problems

The power of convex lens of focal length 50 cm is______

A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii if the refractive index of the material of the lens is 1.5.

What is the focal length of double convex lens for which radius of curvature of either of the surfaces is 30 cm? [ ""_(a) mu_(g)=1.5]

Calculate the power of convex lens of focal length 15 cm.

A concave lens and a convex lens have same focal length of 20 cm and both put in contact this combination is used to view an object 5 cm long kept at 20 cm from the lens combination. As compared to object the image will be

A convex lens has a focal length of 30 cm. An object is kept in front of it at a distance of 90 cm. Find the distance of the image from the lens. What type of image is formed?

The relation between focal length f and radius of curvature R of a spherical mirror is.

Assertion : A double convex lens (mu=1.5) has focal length 10 cm . When the lens is immersed in water (mu=4//3) its focal length becomes 40 cm . Reason : (1)/(f)=(mu_(1)-mu_(m))/(mu_(m))((1)/(R_(1))-(1)/(R_(2)))

The focal length of a convex lens is 20 cm.What is the power?

A real image is obtained at 30 cm from a convex lens of focal length 7.5 cm .Find the distance of the object from tne lens .

TARGET PUBLICATION-OPTICS-EXERCISE
  1. when an object is kept in frnt of a convex lens the distance between i...

    Text Solution

    |

  2. What is the focal length of double convex lens for which radius of cur...

    Text Solution

    |

  3. A plano-convex lens has focal length of 20 cm. the radius of its sph...

    Text Solution

    |

  4. The focal length of concave lens, accroding to new Cartesiaon sign co...

    Text Solution

    |

  5. A diverging lens may NOT have

    Text Solution

    |

  6. A concave lens of focal length f produces an image (1)/(4) of the size...

    Text Solution

    |

  7. A concave lens has radioi of curvatures of 20 cm and 30 cm respective...

    Text Solution

    |

  8. The radius of curvature of each surface of a biconcave lens made up of...

    Text Solution

    |

  9. A single lens, which will form the image of a given object at the same...

    Text Solution

    |

  10. Two thin lenses may be combined so as to

    Text Solution

    |

  11. Two thin lenses with focal lenghts f(1) and f(2) make a lens of focal ...

    Text Solution

    |

  12. Two thin converging lenses of focal length 15 cm and 30 cm are held i...

    Text Solution

    |

  13. What is the focal of the combination of a convex lens of focal length...

    Text Solution

    |

  14. Two thin lenses, aone convex of focal length 10 cm and other concave l...

    Text Solution

    |

  15. Two lenses of power +12and-2 dioptres are placed in contact. What will...

    Text Solution

    |

  16. When two or more lnses of magnification m(1) ,m(2), m(3) are kept in c...

    Text Solution

    |

  17. The separation of whtie light into its constituent colours after passi...

    Text Solution

    |

  18. A shaped triangular transparent block havin three rectangular planes ...

    Text Solution

    |

  19. The angle between the two-plane rectangular refracing surface of a pri...

    Text Solution

    |

  20. The rectangular face opposite to the refracting edge is called .

    Text Solution

    |